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WIRING DEVICES
Technical Hotline
+44 (0)1268 563720
FEATURES
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The built in lock ensures power cannot
be provided without the key being
operated, making it safe to carry out
maintenance to fire alarms
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Printed terminal markings on grey
rear of the switch moulding for clearer
identification
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Double Pole switching
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Only one size of screwdriver required
for installation
Note: The lock fitted to these isolators is universal for all MK 20A Isolators in the range
i.e. a common key profile.
However, the keys are different to those used on all other MK Key Operated Switched Products,
for added security.
20A Key Operated Fire Alarm Isolator Switch
Description
The isolators comply with BS 60669-2-4:2005
The Isolator is intended for use with building alarm systems that are required to
comply with BS 5839 Part 1.
TECHNICAL SPECIFICATION
ELECTRICAL
VOLTAGE RATING
250V a.c.
CURRENT RATING
20A
TERMINAL CAPACITIES
Live, Neutral & Earth
3 x 2.5mm²
3 x 4mm²
2 x 6mm²
PHYSICAL
AMBIENT OPERATING TEMPERATURE
–5°C to +40°C
IP RATING
IP2XD
MAX. INSTALLATION ALTITUDE
2000 metres
Wiring Devices Technical