Siemens Sentron Low Amp Busway System User guide

Brand: Siemens

Model: Sentron Low Amp Busway System

Type: User guide

Sentron Low Amp Busway System

SL402C10PL0

Warehouse Catalog Straight Sections Elbows and Offsets End Tap Boxes

Stock Numbering Tees Center Tap Boxes

System

8 9 10-11 12 13 14

225-800Amp

Sentron Low Amp Busway

Flanged Ends Expansion Fittings, Hangers, Supports Technical Data Busway

Reducers and End Closures and Specifications

Phase Rotation Flanges

Fittings

15 16 17 18-19 20

Sentron Low Amp Busway

Warehouse Stock

Sentron Low Amp busway is available

from warehouse stock in a wide offering

of straight sections and fittings essential

for completing busway runs. Ordering

from stock, can save the contractor both

time and money over cable and conduit.

Aluminum 3-phase, 3-wire and 3-phase,

4-wire busway is available from 225 amps

to 600 amps. Copper 3-phase, 3-wire and

3-phase, 4-wire busway is available from

225 amps to 800 amps. Copper also avail-

able with integral or internal ground. All

warehouse stock is rated IP40.

The chart to the right lists straight

sections and fittings available through

warehouse stock.

Sentron Low Amp Warehouse Stock

Ampere Rating Description Aluminum Copper

225A

6 ft. Plug-in ✔✔

10 ft. Plug-in ✔✔

5 ft. Feeder N/A N/A

10 ft. Feeder N/A N/A

Flat Elbows ✔✔

Edge Elbows ✔✔

End Tap Boxes ✔✔

Center Tap Boxes ✔✔

Flanged Ends N/A N/A

Flanges ✔✔

Hangers ✔✔

End Closures ✔✔

400A

6 ft. Plug-in ✔✔

10 ft. Plug-in ✔✔

5 ft. Feeder ✔✔

10 ft. Feeder ✔✔

Flat Elbows ✔✔

Edge Elbows ✔✔

End Tap Boxes ✔✔

Center Tap Boxes ✔✔

Flanged Ends ✔✔

Flanges ✔✔

Hangers ✔✔

End Closures ✔✔

600A

6 ft. Plug-in ✔✔

10 ft. Plug-in ✔✔

5 ft. Feeder ✔✔

10 ft. Feeder ✔✔

Flat Elbows ✔✔

Edge Elbows ✔✔

End Tap Boxes ✔✔

Center Tap Boxes ✔✔

Flanged Ends ✔✔

Flanges ✔✔

Hangers ✔✔

End Closures ✔✔

Sentron Low Amp Busway

Sentron Low Amp Catalog Numbering System

S L 4 0 2 C 1 0 P L 0 6

Sentron Low Amp

SL = US Lengths

Configuration

3 = 3Ø, 3W

4 = 3Ø, 4W

5 = 3Ø, 4W 200% Neutral

Ampere Rating

02 = 225A

04 = 400A

06 = 600A

08 = 800A1

Bus Bar Material

C = Copper

A = Aluminum

Ground

1 = Integral (Housing)

2 = Internal Bus Bar2

3 = Isolated Ground3

IP Rating

0 = IP40

3 = IP43

4 = IP54

1 Copper Bus Bars only

2 Copper Ground Bars only

3 Copper Ground Bars only:

available in 225A-600A Aluminum Bus Bars

available in 400A-800A Copper Bus Bars only

• Standard feeder lengths shown.

For custom lengths, use the last three catalog

number characters for length in inches,

e.g.: 8'-11" feeder = SL402C10F107

• Catalog Numbers for Hangers and Flanges can be found on page 17

• Specials must be ordered by description (drawing must be included)

See page 56 for New Order Checklist

Plug-in L

Feeder D

Elbows L

Tees E

Offsets F

Combinations O

End Cable T

Tap Boxes

Center Cable T

Tap Boxes

Service Heads H

Transposition R

Joint Stacks Standard

Isolation

Flanged Ends E

End Closures C

EXpansion S

Sections

Reducers Fused

Non-fused

Length 04 = 4'0"

06 = 6'0"

08 = 8'0"

10 = 10'0"

Length 02 = 2'0"

03 = 3'0"

05 = 5'0"

10 = 10'0"

Edge Up

Down

Flat Right

Left

Edge Up

Down

Flat Right

Left

Edge Up

Down

Flat Right

Left

Edge Up Flat Left

Edge Down Flat Left

Edge Up Flat Right

Edge Down Flat Right

Flat Left Edge Up

Flat Left Edge Down

Flat Right Edge Up

Flat Right Edge Down

Vertical Standard

Horizontal

BStandard

Transformer 1 =1 Phase

3 =3 Phase

PG = Phase & Ground

PO = Phase only

GO = Ground only

Suffix part of Catalog Numbers

Straight Sections

Sentron Low Amp Busway can be

ordered with Aluminum or Copper bus

bars. Aluminum bars are available in

225 - 600 ampere sections, and include

an integral housing ground. An optional

copper internal or isolated ground bar is

available in 225-800 ampere sections.

Copper bars are available in 225-800

ampere sections, and include an integral

housing ground. An optional copper

internal ground bar is available. A copper

isolated ground bar is available for 400-800

ampere copper busway.

Sentron Low Amp is also available in IEC

ratings from 100-630 amperes with alu-

minum bus bars or 100-800 amperes with

copper bus bars.

Sentron Low Amp housing is a two-piece

extruded aluminum design which is

assembled using a henrob fastening

process. The self-piercing rivet technology

is a mechanically applied mixture of zinc,

tin and aluminum that coats the rivet to

resist salt, galvanic and other forms of

corrosion. The self-piercing rivets provide

optimal structural integrity.

Feeder Sections

Feeder busway carries the current of the

busway system from the supply source.

Feeder busway does not have plug-in out-

lets. Sentron Low Amp IP40 feeder sec-

tions are warehoused in standard lengths.

Custom lengths and IP43 and IP54 may

be ordered from the factory. Sentron Low

Amp Feeder sections meet IP40 (indoor),

IP43 (spray proof), and IP54 (splash proof)

requirements. One joint stack assembly is

supplied per feeder section.

Plug-In Sections

Sentron Low Amp plug-in sections are

designed with plug-in openings centered

on 24 in. (610mm) intervals. Plug-in open-

ings are staggered on both sides of the

busway for optimum utilization. IP40 plug-

in sections are warehoused in standard

lengths. Sentron Low Amp plug-in sec-

tions meet IP40 (indoor). IP43 (spray

proof), and IP54 (splash proof) require-

ments. One joint stack assembly is provid-

ed per plug-in section.

Plug-In Outlet Features

The plug-in outlet molded guard design

prevents incidental finger contact with live

conductors. Sentron Low Amp plug-in out-

lets are IP 2X rated: a .472 in. (12mm) test

probe is unable to enter a plug-in outlet.

Configuration connections are clearly

marked on the plug-in outlet to ensure

proper contact of phase and ground bars

with bus plug fingers.

Straight Sections

Plug-In and Feeder

L of Joint C

L of Joint

120 in.

(3048 mm) GAø

Bø

Neutral

Cø

Standard Feeder Section

Suffix FD02, FD03, FD05, FD10

Sentron Low Amp Busway

L of Joint C

L Plug-in Outlet C

L of Joint

Sentron Low Amp

12 in.

(305 mm) 24 in.

(610 mm) GAø

Bø

Neutral

Cø

Standard Plug-In Section (Standard plug-in outlets on both sides on 24 in. centers)

Suffix PL04 (4 ft.), PL06 (6 ft.), PL08 (8 ft.), PL10 (10 ft.)

Sentron Low Amp Busway

Sentron Low Amp Busway Widths and Weights

Ampere Profile Approximate Weight – lbs per ft. (kg per meter)

Rating 3-Phase 3-Phase 3-Phase 3-Phase 3-Phase 3-Phase

3-Wire 3-Wire 4-Wire 4-Wire 4-Wire 4-Wire

with Ground with Ground 200% Neutral 200% Neutral

with Ground

Aluminum

225 C 2.7 (4.0) 3.0 (4.4) 2.9 (4.3) 3.1 (4.7) 3.0 (4.5) 3.3 (4.9)

400 D 3.6 (5.4) 4.1 (6.2) 3.9 (5.9) 4.4 (6.6) 4.2 (6.3) 4.7 (7.1)

600 E 5.0 (7.5) 5.8 (8.7) 5.6 (8.3) 6.4 (9.5) 6.2 (9.2) 7.0 (10.4)

Copper

225 A 2.7 (4.0) 2.9 (4.2) 3.0 (4.4) 3.1 (4.6) 3.2 (4.8) 3.4 (5.0)

400 C 3.8 (5.7) 4.1 (6.1) 4.4 (6.5) 4.6 (6.9) 4.9 (7.3) 5.2 (7.7)

600 D 5.7 (8.5) 6.2 (9.2) 6.7 (10.0) 7.2 (10.7) 7.7 (11.5) 8.2 (12.2)

800 E 9.0 (13.3) 9.8 (14.5) 10.8 (16.1) 11.7 (17.3) 12.7 (18.9) 13.5 (20.1)

2.00 in.

(51mm)

5.50 in.

(140mm)

4.05 in.

(103mm)

2.75 in.

(70mm)

Profile E

Barsize

4.25 x 0.125 in.

(108 x 3.2mm)

Profile D

Barsize

2.80 x 0.094 in.

(71 x 2.4mm)

Profile C

Barsize

1.50 x 0.094 in.

(38 x 2.4mm)

Profile A

Barsize

0.75 x 0.094

(19 x 2.4)

5.00 in.

(127 mm)

Sentron Low Amp Busway

Flat Right Elbow

Suffix ELFR

Elbows and Tees

Elbows

Sentron Low Amp elbows provide a sim-

ple, convenient method of changing the

direction (left, right, up or down) of a

busway run. All elbows are shipped with

a joint stack assembly on one end for

direct connection to the busway system.

Flatwise elbows are used for left and

right directional changes when the

busway system is mounted in the hori-

zontal plane; bus bars run parallel to the

floor. The joint stack assembly may be

moved to the opposite leg to change the

orientation from left to right/right to left.

Edgewise elbows create up and down

directional changes. The joint stack

assembly on edgewise elbows can not

be moved in order to change orientation

from up to down/down to up.

For both edgewise and flatwise

elbows the sum of the two legs may

not exceed 10 ft. (3.05m). See drawings

for minimum/standard dimensions.

Tees

Tees are used to simplify directional and

plane orientation changes in a busway

system. Tees can make 90° bends left or

right and up and down along the busway

run. All tees are supplied with two joint

stack assemblies.

Flatwise tees are used to create left and

right branches.

Edgewise tees are used to create

branches that stem up or down from

the busway run.

12 in.

(305 mm)

12 in.

(305 mm)

of Joint

Flat Left Elbow

Suffix ELFL

12 in.

(305 mm)

12 in.

(305 mm)

of Joint

Edge Up Elbow

Suffix ELEU

12 in.

(305 mm)

12 in.

(305 mm)

of Joint

Edge Down Elbow

Suffix ELED

12 in.

(305 mm)

12 in.

(305 mm)

of Joint

Flat Right Tee

Suffix TEFR

12 in.

(305 mm)

12 in.

(305 mm)

12 in.

(305 mm)

Lof Joint C

Flat Left Tee

Suffix TEFL

12 in.

(305 mm)

12 in.

(305 mm)

12 in.

(305 mm)

of Joint

Edge Up Tee

Suffix TEEU

18 in.

(457 mm)

20 in.

(508 mm) 34 in.

(864 mm)

8 in.

(203 mm)

8 in.

(203 mm)

8 in.

(203 mm)

8 in.

(203 mm)

12 in.

(305 mm)

12 in.

(305 mm)

Joint

Edge Down Tee

Suffix TEED

18 in.

(457 mm)

20 in.

(508 mm)

12 in.

(305 mm)

16 in.

(407 mm)

4 in.

(102 mm)

8 in.

(203 mm)

12 in.

(305 mm)

Of Joint

Joint

34 in.

(864 mm)

1Add 4 inches (102mm) for internal or isolated ground.

Sentron Low Amp Busway

Offsets

Offsets can be utilized to solve difficult

contour problems and save space. In

applications where space does not allow

for two connected elbows, a single offset

can bypass an obstruction. All offsets are

supplied with one joint stack assembly.

The overall dimension may not exceed

10 ft. (3.05m).

Flat Right

Suffix OFFR

L of Joint

12 in.

(305 mm)

12 in.

(305 mm)

Flat Left

Suffix OFFL

of Joint

12 in.

(305 mm)

12 in.

(305 mm)

Edge Up

Suffix OFEU

of Joint

12 in.

(305 mm)

12 in.

(305 mm)

Edge Down

Suffix OFED

L of Joint

12 in.

(305 mm)

12 in.

(305 mm)

Flatwise Offsets, Minimum Leg Dimensions

Ampere “A” Std./min.

Rating Inches (mm)

Aluminum

225 7.0 (178)

400 7.5 (191)

600 8.5 (216)

Copper

225 7.0 (178)

400 7.0 (178)

600 7.5 (191)

800 8.5 (216)

Edgewise Offsets, Minimum Leg Dimensions

Ampere “B” Std./min.

Rating Inches (mm)

Aluminum

225 8.5 (216)

400 8.5 (216)

600 8.5 (216)

Copper

225 8.5 (216)

400 8.5 (216)

600 8.5 (216)

800 8.5 (216)

End Tap Boxes and Center Tap Boxes

8.6 in.

(218 mm)

20 in.

(510 mm)

15 in.

(381mm)

8 in.

(203 mm)

31.5 in.

(800 mm)

12 in.

(305 mm)

Horizontal End Tap Box

Suffix ETHS

End Tap Boxes

End tap boxes are non-fusible devices

used to connect cable and conduit to the

end of a busway run or where busway

runs connect without the need for over-

current protection. End tap boxes may be

installed at the end or beginning of a run.

Vertical end tap boxes and horizontal end

tap boxes can be installed in both horizon-

tal and vertical applications. One joint

stack assembly is provided with each end

tap box.

Center Tap Boxes

Center tap boxes are non-fusible devices

utilized to feed to or take off power from

the busway run. When loads served by

the busway run do not require over-

current protection, center tap boxes may

be used. Center tap boxes are an actual

part of the busway run and require a

space of 32 in. (810mm) for installation.

One joint stack assembly is provided with

each center tap box.

Horizontal End Tap Boxes, Lugs

Ampere Cable Lugs per Phase and Neutral

Rating Qty. Size Cu/Al Ground Lugs

#6 AWG-350 kcmil

Aluminum

225 1 #6 AWG - 350 kcmil 1

400 1 #4 AWG - 600 kcmil 1

600 2 #4 AWG - 600 kcmil 1

Copper

225 1 #6 AWG - 350 kcmil 1

400 1 #4 AWG - 600 kcmil 1

600 2 #4 AWG - 600 kcmil 1

800 3 #4 AWG - 600 kcmil 1

Vertical End Tap Boxes, Lugs

Aluminum

225 1 #6 AWG - 350 kcmil 1

400 1 #4 AWG - 600 kcmil 1

600 2 #4 AWG - 600 kcmil 1

Copper

225 1 #6 AWG - 350 kcmil 1

400 1 #4 AWG - 600 kcmil 1

600 2 #4 AWG - 600 kcmil 1

800 3 #4 AWG - 600 kcmil 1

Center Tap Boxes, Lugs

Aluminum

225 4 #6 AWG - 350 kcmil 1

400 4 #4 AWG - 600 kcmil 1

600 4 #4 AWG - 600 kcmil 1

Copper

225 3 #4 AWG - 600 kcmil 1

400 4 #4 AWG - 600 kcmil 1

600 4 #4 AWG - 600 kcmil 1

800 4 #4 AWG - 600 kcmil 1

8 in.

(203mm)

8 in.

(203mm)

Busway

20 in.

(508mm)

6.1 in.

(155mm)

30 in.

(762mm)

16 in.

(406mm)

10 in,

(254mm)

Note: 15 in. (381mm) gutter provided

Center Tap Box

Suffix CTBS

Sentron Low Amp Busway

20 in.

(508mm)

15 in.

(381mm)

8 in.

(203mm)

24.5 in.

(622mm)

12 in.

(305mm)

10 in.

(254mm)

Vertical End Tap Box

Suffix ETVS

124 in. (610mm) for isolated ground

Sentron Low Amp Busway

Flanged Ends

Flanged ends provide a direct connection

to low voltage switchgear, switchboards,

motor control centers, large power panels,

and other electrical distribution equipment.

Flanged ends are shipped with one joint

stack assembly. The switchgear manufac-

ture supplies lugs and mounting hardware.

See illustration for flanged end drilling pat-

terns. A combination flange/elbow may be

used when the busway is in close proximi-

ty to the switchgear. Flatwise and edge-

wise combination flange/elbows require a

minimum clearance of 5 in. (127mm) off

the top of the switchboard to the center-

line of the busway.

Flanged End

Suffix FE

1.75 in.

(44mm) 1.75 in.

(44mm)

1.13 in.

(29mm)

1.13 in.

(29mm) 1.13 in.

(29mm)

1.75 in.

(44mm)

4.50 in.

(114mm) 4.50 in.

(114mm)

2.80 in.

(71mm)

1.40 in.

(36mm)

1.75 in.

(44mm) A

For 4.25 in. (108mm) Bars

Fig 1, 0.75 in. (19mm),

Fig 2, 1.50 in. (38mm)

and 2.80 in. (71mm) Bars

Housing Ground

Case

15.00 in.

(381mm)

1.50 in.

(38mm)

6.13 in.

(158mm)

0.62 in.

(16mm)

0.62 in.

(16mm)

0.62 in.

(16mm)

5.00 in.

(127mm)

10.00 in.

(254mm)

0.38 in.

(10mm)

7.87 in.

(200mm)

3.94 in.

(100mm)

1.55 in.

(39mm)

4.33 in.

(110mm)

7.50 in.

(191mm)

12.63 in.

(321mm)

6.32 in.

(161mm)

L Case

3.57 in.

(91mm)

8.00 in.

(203mm)

8.00 in.

(203mm)

4.00 in.

(102mm) 4.00 in.

(102mm)

2.13 in.

(54mm) 5.03 in.

(128mm)

Case

Ground Strap

Joint

Stack

Neutral CØ BØ AØ Isolated Ground

Ground

Dashed lines

denote cutout

Flanged Ends Bus Bar Drilling Pattern, Dimensions

Ampere Dimensions Inches (mm) Figure No.

Rating W A

Aluminum

225 1.50 (38) 0.75 (19) 2

400 2.80 (71) 1.40 (36) 2

600 4.25 (108) 1.25 (32) 2

Copper

225 0.75 (19) 0.38 (97) 1

400 1.50 (38) 0.75 (19) 2

600 2.80 (71) 1.40 (36) 2

800 4.25 (108) 1.25 (32) 2

0.44 in.

(11mm)

0.88 in.

(22mm)

0.88 in.

(22mm)

0.38 in.

(10mm)

Figure 1 Figure 2

ø .56 in.

(14mm)

Expansion Fittings, Reducers and

Phase Rotation Fittings

12.75 in.

(324mm)

8 in.

(203mm)

24.8 in.

(630mm) 21 in.

(533mm)

38 in.

(965mm)

8 in.

(203mm) C

Expansion Fitting

Suffix XS

8 in.

(203 mm)

32 in.

(813 mm)

48 in.

(1219 mm)

8 in.

(203 mm)

10 in.

(254 mm)

9 in.

(229 mm)

Phase Rotation Fitting

Suffix TRPG, Phase and Ground

TRPO, Phase only

TRGO, Ground only

Expansion Fittings

Expansion fittings accommodate for

expansion and contraction of a busway

run. In order to compensate for the

difference in the coefficient of expansion

between the copper/aluminum bus bars

and the aluminum housing, an expansion

fitting must be used. Expansion fittings

are installed in the center of long busway

runs, where both ends of the run are held

in a permanent, fixed positions or where

a busway run crosses an expansion joint

of a building. Additionally, NEMA recom-

mends the use of expansion fittings

when the run exceeds 200 ft. (608m).

Expansion fittings allow for a +/- 2 in.

(50.8mm) movement along the length of

the busway system.

Fused Reducers

The NEC (Art. 364-11) requires overcur-

rent protection when busway systems

are reduced in ampacity. A fused reducer

is used to reduce the allowable ampere

rating in those sections of the busway run

that do not require a higher rating (i.e. at

branch circuit junctures).

Non-Fused Reducers

Non-fused reducers are used in conjunc-

tion with the following exception to the

NEC (Art. 364-11): "For industrial estab-

lishments only, omission of overcurrent

protection shall be permitted at points

where busways are reduced in ampacity,

provided that the length of the busway

having the small ampacity does not

exceed 50 ft. (15.2m) and has an ampaci-

ty of at least equal to one-third the rating

or setting of the overcurrent device next

back on the line, and provided that such

busway is free from contact with com-

bustible material."

Special joint stack connections are

provided for non-fused reducer connec-

tions. Consult Factory for specific design

guidelines.

Sentron Low Amp Busway

36 in.

(914mm)

1.5 in.

(38mm)

4.5 in.

(114mm)

11 in.

(279mm)

20 in.

(508mm)

20 in.

(508mm)

Fused Reducer

Suffix RF

Phase Rotation Examples

125 in. (608mm) for isolated ground

Phase-Rotation Fittings

Phase-rotation fittings can be used when

the application requires a phase rotation in

the power supply. Phase rotation fittings

can be ordered for "phase and ground",

"phase only" and "ground only" rotations.

Hangers

A complete selection of hangers is available

to support Sentron Low Amp Busway in

both vertical and horizontal applications. The

standard picture frame hanger comes com-

plete with hardware (cat# UJ100) to connect

to a ceiling hung drop rod. The contractor

must supply drop rods to complete assem-

blies for both picture frame hangers and

trapeze hangers. Picture frame and trapeze

hangers are designed to be hung on maxi-

mum 10 ft. (3.05m) centers throughout the

busway run. Additional hangers may be

used if structural requirements mandate

their use. Spring hangers and floor supports

must be used in vertical applications to pro-

vide secure mounting of the busway run.

Spring hangers counter the weight of the

busway on each floor and also compensate

for minimal building movement and thermal

expansion. Maximum distance between

spring hangers or supports may not exceed

16 ft. (4.88m). When ordering 18 ft. (5.49m)

floor to ceiling height assemblies, intermedi-

ate supports or hangers are necessary.

Flanges

Wall, ceiling and floor flanges are available

for Sentron Low Amp Busway. When the

busway run passes through a wall, ceiling or

floor a flange should be used. Flanges do

not offer support to the busway, only a

means of covering the hole created in the

existing structure. An additional sealant may

be required to meet fire codes and all other

local requirements. No caulking or gasketing

is provided with Sentron Low Amp flanges.

End Closures

End closures safely terminate a busway run

and protect the bus bar ends. End closures

may be removed easily in order to extend

a busway run. End closures are shipped

with Glastic insulation pieces; however,

joint stacks and inspection covers are not

included. To ensure proper installation,

refer to the end closure installation instruc-

tion sheet shipped with end closure.

Lifting Kit

A specially designed lifting kit (cat. no. SLLK)

is recommended when installing Sentron

Low Amp Busway. This lifting kit is designed

to help properly install the busway without

damaging equipment during the process. 17

Sentron Low Amp Busway

Hangers, Supports,

End Closures and Flanges

9.25 in.

(235 mm)

4" D

B= 4 in. plus D/2 (refer to page 11)

Wall Mounted Hanger

SLWH

C Lof Joint

Stack

16 in.Min.

(406mm)

Piercing

Screw

Floor Flange

(optional

Spring Hanger

2 in.Min.

(51mm)

by others

10 in.

(254mm)

Leveling

Jam Nut

Support

Bolt

Spring Hanger Spring Hangers, Requirements

Ampere Catalog Assembly for Floor to Ceiling Height 1

Rating 10 ft. 12 ft. 14 ft. 16 ft. 18 ft.2

Aluminum Busway

225 SLSH218SLSH218SLSH235SLSH418SLSH418

400 SLSH418SLSH418SLSH418SLSH435SLSH435

600 SLSH418SLSH435SLSH435SLSH435SLSH435

Copper Busway

225 SLSH218SLSH218SLSH418SLSH418SLSH418

400 SLSH418SLSH418SLSH418SLSH435SLSH435

600 SLSH435SLSH435SLSH435SLSH435SLSH635

800 SLSH435SLSH435SLSH635SLSH635SLSH635

1For height not listed, use next higher value.

2Additional floor support necessary for intermediate support

Wall, Ceiling and Floor Flanges, Dimensions

Ampere Catalog No.Fig. Dimensions Inches (mm)

Rating “A” Flange “B” Cutout

Aluminum Busway

225 SLWF3 1 7.94 (202) 4.25 (108)

400 SLWF4 2 9.24 (235) 5.55 (141)

600 SLWF5 2 10.69 (272)7.00 (178)

Copper Busway

225 SLWF1 1 7.19 (183) 3.50 (89)

400 SLWF3 1 7.94 (202) 4.25 (108)

600 SLWF4 2 9.24 (235) 5.55 (141)

800 SLWF5 2 10.69 (272)7.00 (178)

Cutout

3.25 in.

(83 mm)

6.50 in.

(165 mm)

Cutout

10.00 in.

(254 mm)

5.00 in.

(127 mm)

A/2 0.60 in.

(15 mm)

0.38 in.

(10 mm)

0.63 in.

(16 mm)

3.62 in.

(92 mm) 3.62 in.

(92 mm)

Cutout

3.25 in.

(83 mm)

6.50 in.

(165 mm)

Cutout

10.00 in.

(254 mm)

Figure 1 Figure 2

Wall, Ceiling and Floor Flanges

5.82 in.

(148 mm)

of Joint

End Closures

Suffix EC

(Joint stack and covers not included)

Picture Frame Hanger

SLPF

(Rods not included)

(UJ100

included)

2.25 in.

(57mm)

Floor Support Hanger

SLFS

8.63 in.

(219 mm)

0.50 in.

(12 mm) Dia.

Threaded Rod

.75 in.

(19.1 mm)

Trapeze Hanger

SLTH

(Rods and Nuts not included)

Sentron Low Amp Busway

Technical Data

Voltage Drop

Ampere Bus Bar Width Ohms x 10-3 per 100 feet Voltage Drop - Concentrated Loads, Line-to-Line per 100 feet at 100% Rated Load, 35°C Ambient

Rating x Thickness Line to Neutral Power Factor

Inches (mm) R Z X 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

Aluminum

225 1.50 (38) x .094 (2.4) 10.90 11.10 2.10 2.05 2.45 2.83 3.20 3.56 3.89 4.18 4.25

400 2.80 (71) x .094 (2.4) 6.46 6.55 1.08 2.06 2.48 2.89 3.29 3.67 4.03 4.35 4.48

600 4.25 (108) x .125 (3.2) 3.64 3.68 0.54 1.67 2.03 2.38 2.72 3.05 3.36 3.65 3.78

Copper

225 0.75 (19) x .094 (2.4) 13.40 13.50 1.64 2.18 2.67 3.16 3.64 4.11 4.56 4.98 5.22

400 1.50 (38) x .094 (2.4)) 7.09 7.17 1.07 2.18 2.64 3.10 3.54 3.97 4.37 4.74 4.91

600 2.80 (71) x .094 (2.4) 3.92 3.95 0.49 1.70 2.09 2.47 2.85 3.21 3.56 3.89 4.07

800 4.25 (108) x .125 (3.2) 2.11 2.13 0.29 1.26 1.54 1.81 2.08 2.33 2.58 2.81 2.92

Temperature Heat Rise, ALUMINUM

Notes:

1. For plug-in distributed loads, divide voltage

drop values by 2.

2. To determine voltage drop line-to-neutral, multiply

line-to-line values by 0.577.

3. Actual voltage drop for different lengths and at loadings

less than full rated current can be calculated

using the formula:

Vd(actual) = Vd (table) x actual load x actual length (ft)

rated load 100 feet

4. For 50 Hz, multiply reactance (X) by 0.85 and resistance

values do not change.

For 400 Hz, multiply reactance by 3.75 and multiply

resistance by 1.4. Calculate new voltage drop:

Vd= amps load x =√3(Rcos θ+ X sin θ) per

100 ft, where cos θ= Power Factor.

5. For metric conversion R, X, Z values

“in Ohms per meters Line to Neutral”

R x .0328

X x .0328

Z x .0328

6. For metric conversion

“Line to Line per meter at 25° C ambient in mV/A/m”

(Vd 32.8) / A Divide Vd by 2 for distributed loads.

600A

400A

225A

10070

1000

900

800

700

500

400

300

100

200

600

6040 503020010 Temperature Rise °C (above ambient)

Load in Amps Busway

Size

800A

600A

400A

225A

10070

1000

900

800

700

500

400

300

100

200

600

6040 503020010 Temperature Rise °C (above ambient)

Load in Amps Busway

Size

Temperature Heat Rise, COPPER

Sentron Low Amp Busway

UL Short Circuit Ratings

Ampere Bus Bar Width RMS Symmetrical (kA)

Rating Inches (mm) 6 cycle 1 sec. 3 sec.

Aluminum

225 1.50 (38) x .094 (2.4) 30 6 4

400 2.80 (71) x .094 (2.4) 42 17 10

600 4.25 (108) x .125 (3.2) 50 28 16

Copper

225 0.75 (19) x .094 (2.4) 30 10 5

400 1.50 (38) x .094 (2.4) 35 20 12

600 2.80 (71) x .094 (2.4) 42 32 18

800 4.25 (108) x .125 (3.2) 65 42 24

50% Internal or

Isolated

Ground (PE)

A Phase (L1)

B Phase (L2)

C Phase (L3)

100% Neutral (N)

200% Neutral (N)

Ground Capacity

Ampere Bus Bar Width Bars Min. Sectional Area Sectional Area Sectional Area Current Carrying

Rating Inches (mm) per Pole Ground Bus or Enclosure 50% Internal Integral (Housing) Capacity Ratio

UL 857 Table 6.1 Ground Bar Ground Integral/Internal

In2(mm2)In

2(mm2)In

2(mm2)

Aluminum

225 1.50 (18) 1 0.083 (54.0) 0.084 (54.19) 2.124 (1370.32) 11.35

400 2.80 (71) 1 - 0.156 (100.64) 2.582 (1665.80) 7.43

600 4.25 (108) 1 - 0.235 (151.61) 3.094 (1996.13) 5.92

Copper

225 0.75 (19) 1 0.052 (34.0) 0.043 (27.74) 1.868 (1205.16) 19.50

400 1.50 (38) 1 - 0.084 (54.19) 2.124 (1370.32) 11.35

600 2.80 (71) 1 - 0.156 (100.64) 2.582 (1665.80) 7.43

800 4.25 (108) 1 0.105 (68.0) 0.235 (151.61) 3.094 (1996.13) 5.92

Note: Ground bar thickness = .055 in. (1.4mm)

UL 1479 Fire Rated Installation

Sentron Low Amp is certified in accor-

dance with UL 1479 and offers a two

hour fire rating for gypsum wallboard con-

struction, and a three hour fire rating for

concrete slab or block penetrations.

These ratings are achieved using stan-

dard busway installed with SpecSeal®

sealant from Specified Technologies Inc.

Sentron Low Amp Busway

1.0 General

A. Furnish and install a complete low

impedance prefabricated busway distri-

bution system as shown on the plans.

B. Busway shall be ____ volts ____ phase

____ wire with minimum 50% capacity

integral ground. Aluminum housing shall

qualify for grounding purposes.

C. The ampere ratings, approximate

footage, fitting, plug-in units, etc., are

shown on the plans. The electrical con-

tractor shall be responsible for routing

the busway to coordinate with the other

trades. Final field measurements shall be

made by the contractor prior to release of

the busway for fabrication.

2.0 Short-Circuit Rating and Tests

A. The short-circuit rating of the busway

shall be (consulting engineer’s calculated

required rating), RMS symmetrical

amperes.

B. The short circuit rating of the busway

shall be determined according to UL

Standard No. 857 or IEC 439-1 and 439-2.

This rating must be based upon actual

tests at the rated short-circuit current for

six (6) cycles.

3.0 Basic Construction

A. Housing

1. The busway housing shall be of

extruded aluminum painted with

polyester urethane powder paint to

provide protection against corrosion.

2. The busway housing shall be totally

enclosed non-ventilated for protection

against mechanical damage and dust

accumulation.

3. The busway shall be certified for ___

IP 40 Indoor, ___ IP 43 Spray Proof,

___ IP 54 Splash Proof).

B. Joint

1. The busway joint shall be of the one-

bolt type which utilizes a high

strength steel bolt and Belleville

washers to maintain proper pressure

over a large contact surface area.

2. The bolt shall be torque indicating,

fully insulated and at ground potential.

3. The bolt shall be two-headed design

to indicate when proper torque has

been applied and require only a

standard long handle wrench to be

properly activated.

B Joint (cont’d)

4. Access shall be required to only one

side of the busway for tightening joint

bolts.

5. It shall be possible to remove any

joint connection assembly to allow

electrical isolation or physical removal

of a busway length without disturbing

adjacent busway lengths.

C. Bus Bars

1. The bus bars shall be tin plated at all

contact surfaces.

2. Each bus bar shall be insulated over

its entire length with Class B, 130° C

electrostatically applied epoxy

insulation.

3. The temperature rise at any point in

the busway shall not exceed 55°C

rise above ambient temperature

when operating at rated load current.

D. Plug-in Openings

1. On plug-in busway there shall be five

dead front, hinged cover type plug-in

openings on each side of ten-foot

lengths.

2. All openings shall be usable simulta-

neously.

3. Busway shall be installed so that

plugs are side mounted to permit

practical use of all ten plug-in

openings.

4. It shall be possible to inspect the

plug-in opening and bus bars prior to

the installation of the plug-in unit.

5. All plug-in openings should be

rated IP2X.

E. Support of Busway

1. Hanger spacing shall be noted on lay-

out drawings and should not exceed

manufacturers’ recommendations.

2. Feeder and plug-in busway shall be

approved for hanger spacing of up to

10 ft. for horizontally mounted runs

and up to 16 ft. for vertically mounted

runs.

F. Underwriters’ Laboratories Listing

1. All straight lengths, fittings, and plug-

in units shall be listed and marked in

accordance with UL Standard No. 857

or IEC 439-1 and 439-2.

2. This listing shall include mounting of

the busway in any position (i.e., hori-

zontal, flatwise, edgewise, and verti-

cal) without derating.

4.0 Voltage Drop

A. The voltage drop (input voltage minus

output voltage) specified shall be based

on the busway operating at full rated cur-

rent and at stabilized operating tempera-

ture in 35°C ambient temperature.

B. The three-phase, line-to-line voltage drop

shall not exceed 4.2 volts per hundred

feet at 70% power factor concentrated

load, which condition may exist during

motor starting.

5.0 Plug-In Units

A. Plug-in units shall be ___ circuit breaker

type or ___ fusible switch type with visi-

ble blade, and quick-make / quick-break

mechanism.

B. Plug-in units which cannot be operated

directly from the floor shall be equipped

with suitable means for hookstick opera-

tion.

C. The interrupting rating of circuit breaker

plug-in units shall be [ ] RMS symmetri-

cal amperes.

6.0 Plug-In Unit Safety Devices

A. Each plug-in unit shall be mechanically

interlocked with the busway housing to

prevent installation or removal of plug-in

units while the switch is in the ON posi-

tion.

B. Plug-in enclosures shall make positive

ground connection with the ground bus

before the contact fingers make contact

with the phase bars.

C. The plug-in units shall be equipped with

internal barriers to prevent accidental

contact with live parts on the line side of

the protective device during time of wire

pulling.

D. Covers of all plug-in units must have

“releasable” type interlocks to prevent

the cover from being opened when the

switch is in the ON position.

7.0 Fire Rating

A. The busway shall be UL Listed

to meet two-hour fire ratings for gypsum

wallboard construction and three-hour

fire rating for poured concrete or con-

crete block construction.

8.0 Quality

A. All busway products shall be manufac-

tured in a facility which is Quality

Systems registered to ISO9001.

9.0 Approved Suppliers

A. All major components shall be of the

same manufacturer as the busway. The

busway and plug-in units shall be manu-

factured by Siemens.

Sentron Low Amp Busway Specifications

Siemens Sentron Low Amp Busway System User guide

Siemens Sentron Low Amp Busway System User guide

Siemens Sentron Low Amp Busway System User guide

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