MK K4858
The MK K4858 is a locking device designed to be used with the MK 10amp 3 Pole Fan Isolator. It prevents the switch from being accidentally turned back on, ensuring safety during maintenance or repairs.
Key Features:
- Compatible with MK 10amp 3 Pole Fan Isolator
- Ensures the switch remains off when engaged
- Provides additional safety during maintenance or repairs
Use Cases:
- Ideal for use in bathrooms, where it helps prevent accidental activation of the fan switch while showering or bathing
- Suitable for any situation where it's crucial to ensure the fan remains off, such as during electrical work or cleaning
MK K4858
The MK K4858 is a locking device designed to be used with the MK 10amp 3 Pole Fan Isolator. It prevents the switch from being accidentally turned back on, ensuring safety during maintenance or repairs.
Key Features:
- Compatible with MK 10amp 3 Pole Fan Isolator
- Ensures the switch remains off when engaged
- Provides additional safety during maintenance or repairs
Use Cases:
- Ideal for use in bathrooms, where it helps prevent accidental activation of the fan switch while showering or bathing
- Suitable for any situation where it's crucial to ensure the fan remains off, such as during electrical work or cleaning
10amp 3 Pole Fan Isolator
Complies with BS EN 60947-3
Please keep this leaflet for future reference
SAFETY INSTRUCTIONS
• This product must be installed by a competent person in
accordance with the current editions of the IEE Wiring
Regulations (BS7671) and Buildings Regulations. If in any
doubt, consult a qualified electrician.
• The 3 Pole Fan Isolator can be installed in bathrooms,
but only under the strictest of conditions. It must be out
of reach of any person using the bath or shower.
For guidance see the current edition of the IEE wiring
regulations (BS 7671).
• To prevent electrocution, do not work on any appliance
live. Switch off the mains supply before commencing work.
• If this product has a metal front plate it must be earthed.
• To prevent fire hazard do not exceed the rated current.
• When mounted using a metal back box the following
minimum box depths should be used: -
With a front plate of 9mm depth or greater - 16mm.
With a front plate of less than 9mm depth - 35mm.
44966 PL Ed.2
The back box for products having front plates less than
9mm deep needs to be installed 6 to 10mm sub-flush to
the wall surface.
• Product and packaging should be disposed of via
standard refuse facilities at the end of their life.
PRODUCT FEATURES
This product is intended for use with extractor fans with or
without a timer.
It enables the fan to be isolated and subsequently
disconnected for repair or maintenance.
The switch has provision for a locking device (K4858 if
bought separately) to ensure that it cannot be accidentally
switched back on.
When the switch is in the off position, a hole at each end of
the switch actuator is exposed (fig. 1). The lugs in the jaw of
the locking device must be fully engaged in the holes to
ensure correct operation and fitment of padlock (fig. 2).
INSTALLATION GUIDE
1. Some products have the fixing screws clipped to the rear
of the product. These should be unclipped.
2. If replacing an existing isolator unit, always take careful
note of the cables and any terminal markings there may be
before removing the old unit. This should make it far easier
to install the new product.
234
3. Strip back the outer sheath on both load and supply
cables, then trim wires to approximate length to allow
the cable ends to reach the terminals.
SUPPLY cables are those from the distribution board,
LOAD cables are those going to the fan.
4. Carefully strip back the inner insulation of all cables to
expose 8mm of the conductor.
5. If an earth lead is present, slide a length of green/yellow
sleeving onto the bare earth conductors.
6. Connect the cables to the correct terminals, as shown in
either Figure 3 or 4 as appropriate. It can be seen that
the main difference is dependent on the circuit having a
timer, but the circuit may also be with or without a lamp.
Please also ensure the circuit complies with that from the
fan manufacturer.
7. Please note; the colour codes used in the UK prior to
April 2004 are as follows:-
RED = terminal marked ‘L’
BLACK = terminal marked ‘N’
GREEN/ YELLOW = terminal marked ‘ ’
on
off
isolator
ELECTRICIAN WORKING
DO NOT REMOVE
on
E
LE
CTRICIAN
WORKING
DO
NOT RE
MOV
E
Holes for
locking device
Fig. 1
Fig. 2
44966PL Ed2 2/2/2006 12:05 pm Page 1
In all other areas of the EU, as well as new build
installations in the UK after April 2004, the colour codes
used are: -
8. A length of green/yellow sleeved wire must be
connected to the earth terminal in the mounting box.
9. Tighten all terminal screws securely.
10.Carefully push the wired unit back into the back box,
ensuring the cables are not trapped or pinched.
11.Using the fixing screws provided, mount the switch onto
the back box. Do not over tighten, so as to prevent
damage or distortion to the front plate. Adjust so the
front plate is square on the wall.
CLEANING FRONT PLATES
In order to protect the quality surface finish of the front
plate, periodically clean with a dry lint free soft cloth. On no
account should abrasive or domestic cleaners be used.
567
BROWN = terminal marked ‘L’
BLUE = terminal marked ‘N’
GREEN/YELLOW = terminal marked ‘ ’
L1 L 2 N
NL2L1
L1 L 2 N
NL2L1
N
L
N
L (Switched)
L (Switched)
TOP
Rear view of
fan isolator
N
L
TOP
N
To the Fan Unit
To the Fan Unit
Supply
Supply
L1 L 2 N
NL2L1
N
L
L (Unswitched)
N
L (Switched)
L (Switched)
TOP
N
L
TOP
L1 L 2 N
NL2L1
L (Unswitched)
N
To the Fan Unit
To the Fan Unit
Supply
Supply
S
Fig. 3 Two Pole switching for fan units without a timer Fig. 4 Three Pole switching for fan units with a timer
®
MK Electric
Novar ED&S Ltd
The Arnold Centre, Paycocke Road, Basildon,
Essex SS14 3EA. U.K.
Tel: +44 (0) 1268 563000
Fax: 01268 563405
(UK Sales)
Fax: +44 (0) 1268 563360 (International)
email: [email protected]
web site: www.mkelectric.co.uk
Technical queries should be made to:
MK Electric, Technical Sales and Services Department
The Arnold Centre, Paycocke Road, Basildon, Essex SS14 3EA
Tel: +44 (0)1268 563720 Fax: +44 (0)1268 563064
All marks in this document identified with a R or TM symbol
adjacent to the mark are Trade Marks of Novar ED&S Limited.
44966PL Ed2 2/2/2006 12:05 pm Page 2
-
1
-
2
MK K4858 Installation guide
- Type
- Installation guide
- This manual is also suitable for
MK K4858
The MK K4858 is a locking device designed to be used with the MK 10amp 3 Pole Fan Isolator. It prevents the switch from being accidentally turned back on, ensuring safety during maintenance or repairs.
Key Features:
- Compatible with MK 10amp 3 Pole Fan Isolator
- Ensures the switch remains off when engaged
- Provides additional safety during maintenance or repairs
Use Cases:
- Ideal for use in bathrooms, where it helps prevent accidental activation of the fan switch while showering or bathing
- Suitable for any situation where it's crucial to ensure the fan remains off, such as during electrical work or cleaning
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