Pelco Conduit Sealing Instructions for Equipment In Hazardous Location Installation guide

Brand: Pelco

Model: Conduit Sealing Instructions for Equipment In Hazardous Location

Type: Installation guide

Product specifications and availability are subject to change without notice.

The materials used in the manufacture of this document and its components are compliant to the requirements of Directive 2002/95/EC.

Pelco, Inc. 625 W. Alluvial Fresno, California 93711

United States USA & Canada Tel (800) 289-9100 Fax (800) 289-9150

International Tel +1 (559) 292-1981 Fax +1 (559) 348-1120

www.pelco.com

System Connection Examples

NOTE: The following illustrations of system connections are provided only as a guideline. Actual connections are dictated by local authorities and the A&E

specifications of the site. Pelco makes no recommendations on the connection of this system in a hazardous location.

Nipples (supplied with enclosure)

Sealing fittings (supplied with enclosure)

Explosionproof nipple

Explosionproof elbow

Explosionproof flexible conduit, for Class 2 wiring

Explosionproof flexible conduit, for Class 1 wiring

Explosionproof J-box, for connection of pan/tilt and

Class-1 camera; for ease of wire pulls, locate as close to

the pan/tilt as possible

Sealing fitting, for separation of hazardous and

nonhazardous locations

Sealing fitting (supplied provided pan/tilt)

~í

Nipple (supplied with pan/tilt)

Nipple (supplied with enclosure)

Sealing fitting (supplied with enclosure)

Explosionproof nipple

Explosionproof flexible conduit, for Class 2 wiring

Sealing fitting, for separation of hazardous and nonhazardous

locations

WARNING: Be sure to seal the cable entry conduit fitting with the appropriate sealant (not supplied) during installation.

ENCLOSURE

PAN/TILT

Figure 6. EHX*E Enclosure and PT1260EX Pan/Tilt

EXSITE

POSITIONING

SYSTEM

Figure 7. ExSite Series Explosionproof Positioning System

REVISION HISTORY

Manual # Date Comments

C903M 9/92 Original version.

C903M-A 11/94 Revised format to two columns. Added an example system connection containing a figure and parts description.

C903M-B 6/03 Added "For U.S. reference only." Changed "Example System Connection" to "System Connection Example." Changed "EHX" to EHX*E."

C903M-C 8/04 Document rewritten and reformatted. Added information about NEC installation requirements, and added Introduction. Added another figure and parts

description. Some information removed.

C903M-D 4/10 Document rewritten and reformatted. Added "EECEX and ATEX Only" information. Added Parts List and User-Supplied Parts.

C903M-E 10/10 Added a warning to install appropriate sealant.

C903M-F 4/13 Added UL/cUL zones and U.S. Groups C&D (Explosion Proof) information in the headings, and included metric measurements.

A certified flameproof “d”, “tb”, and IP66 sealing device, such as a stopping box with setting compound, shall be provided either in the flameproof enclosure

or immediately at the entrance thereto.

This document is based on NEC installation requirements for equipment installed in hazardous locations in the United States of America.

Description

Conduit seals prevent explosions from spreading through conduit systems and igniting outside atmospheres. When properly installed and filled with a

UL-listed sealing compound, they prevent the passage of gases, vapors, or flames from spreading from a hazardous location to a nonhazardous location.

The information describes the main purposes for seal fittings:

• Restrict the passage of gases, vapors, or flames from one part of the conduit system to another area of

the system.

• Limit explosions to the sealed enclosure.

• Prevent precompression, or “pressure piling,” in conduit systems.

PARTS LIST

For an example of possible system connections, refer to System Connection Examples on page 4.

EHX*E SERIES ENCLOSURE AND PT1260EX PAN/TILT

EXSITE SERIES EXPLOSIONPROOF POSITIONING SYSTEM

USER-SUPPLIED PARTS

EHX*E Series Enclosure and PT1260EX Pan/Tilt ExSite Series Explosionproof Positioning System

For IECEX, ATEX, and UL/cUL Zones Only

For U.S. Groups C&D (Explosion Proof) Only

WARNING: Failure to follow safety instructions may cause ignition of hazardous

atmosphere resulting in serious personal injury and/or property damage.

Qty Description

2 Nipple (supplied with enclosure)

2 Sealing fitting (supplied with enclosure)

1 Sealing fitting (supplied with pan/tilt)

1 Nipple (supplied with pan/tilt)

Qty Description

1 Nipple (supplied with enclosure)

1 Sealing fitting (supplied with enclosure)

Qty Description Qty Description

1 Explosionproof nipple 1 Explosionproof nipple

1 Explosionproof elbow 1 Explosionproof flexible conduit (Class 2 wiring)

1 Explosionproof flexible conduit (Class 2 wiring) 1 Sealing fitting

1 Explosionproof flexible conduit (Class 1 wiring) 1 Sealing compound

1 Explosionproof J-box 1 Fiber filler

1 Sealing fitting

1 Sealing compound

1 Fiber filler

EXPLOSIONPROOF

SWITCH

IGNITABLE GASES OR VAPORS

IGNITED BY SPARK OF SWITCH

EXPLOSION CONFINED

WITHIN SEALED AREA

SF SEAL WITH DRAIN VALVE

SEALING CEMENT

POURING OPENING

FIBER DAM

Figure 1. How Gases, Vapors, and

Flames Are Contained

INSTALLATION

Conduit Sealing Instructions for Equipment in

Hazardous Locations

C903M-F (4/13)

2 C903M-F (4/13)

NEC SEC. 501-15 HIGHLIGHTS ON SEALING FITTING REQUIREMENTS

CLASS I, DIV. 1 AND 2

Conduit seals must be placed within 45cm (18 in.) of the conduit entry to an explosionproof enclosure where either of the following apply:

1. The enclosure contains apparatus that may produce arcs, sparks, or high temperatures.

2. The conduit entry is metric designator 53 (trade size 2) or larger and the enclosure contains terminals, splices, or taps.

Figure 2. Conduit Seal Distance

Sealing fittings must be installed at a boundary between a hazardous and nonhazardous area. Sealing fittings must also be installed at a boundary between

a Class I, Div. 1 area and a Class I, Div. 2 area.

Figure 3. Sealing the Enclosures

Other NEC Requirements:

• Splices and taps are not to be used in sealing fittings.

• Where moisture may accumulate in system, an approved method must be provided to remove such accumulation.

• Depth of sealing compound should be to trade size of conduit, having a minimum thickness of 5/8 of an inch.

NOTE: Values in parentheses are inches; all others are centimeters.

ENCLOSURE

TO BE SEALED

45.00 MAX

(18.00)

NONHAZARDOUS AREA

NONHAZARDOUS AREAHAZARDOUS AREA

HAZARDOUS AREA

NO UNION, COUPLING, BOX, OR FITTING IN CONDUIT

IS PERMITTED BETWEEN SEALING FITTING AND

POINT WHERE CONDUIT LEAVES HAZARDOUS AREA

ENCLOSURE

TO BE SEALED

ENCLOSURE TO BE SEALED

SEAL MAY BE POSITIONED

ON EITHER SIDE OF BOUNDARY

C903M-F (4/13) 3

Installation

1. Run the conductors through the fitting.

2. Pack the sealing fitting with fiber filler. In a horizontal run, place the fiber filling at both ends of the fitting (refer to Figure 4); in a vertical run, fill only

the bottom end (refer to Figure 5).

Fiber filler makes a dam that keeps the sealing compound in the chamber of the sealing fitting while it cures and hardens. The fiber dam is also used

to separate the individual conductors so the sealing compound seals around each conductor. If the electrical conductors are not properly separated,

gases can migrate through the seal, making the seal ineffective.

3. Prepare the sealing compound. Use sealing compound suitable for the application and follow the instructions supplied by the sealing compound

manufacturer.

4. Pour the sealing compound into the fitting.

FIBER FILLER

SEALING

COMPOUND

Figure 5. Vertical Fitting, Damming and Sealing

SEALING COMPOUND

FIBER FILLER

Figure 4. Horizontal Fitting, Damming and Sealing

Pelco Conduit Sealing Instructions for Equipment In Hazardous Location Installation guide

Pelco Conduit Sealing Instructions for Equipment In Hazardous Location Installation guide

Pelco Conduit Sealing Instructions for Equipment In Hazardous Location Installation guide

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