4 inch fan

c.boy · Sep 23, 2011

Hi all

Got a new extension to wire which has 2 en suitesneed to wire two fans.Do i need to put an isolator switch in??? i was thinking about a 2 gang switch outside to isolate.
The circuit is protected by a rcbo. just not sure.

MANY THANKS.

isitnow · Sep 23, 2011

Extractor Fans Extractor fans must be provided with an easily accessible means of switching off the supply 132.15.2 Electrical Equipment that may cause injury during mechanical maintenance i.e. fans, must be provided with a means to switch off the supply. 537.3.1.1 All items of current using Equipment must be provided with a functional switching device. 537.5.1.3 All Electrical Equipment must be accessible for operation, inspection & testing , maintenance and repair. 132.12
“ Immersion Heaters “
An immersion heater must not be supplied by a ring final circuit. p362, 433.1.5
An immersion heater must be connected to the supply by a double pole linked switch only. The use of a plug top and socket outlet is not permitted. 554.3.3
An immersion heater must be provided with a thermal cut-out to prevent the water from boiling if the thermostat fails. 554.2.1
All final circuits must be wired separately from all other final circuits. 314.4
All Electrical Equipment must be accessible for operation, inspection & testing, maintenance and repair. 132.12

from another thread by amberleaf thread called "useful information for the working sparky" is a good thread full of good info you should go on ther and hit his thanks button

Octopus · Sep 23, 2011

IMHO the simple answer is yes. Extractor fans should always have means of "local" isolation.

Tin hat on!

i=p/u · Sep 23, 2011

is it bad to have fan switch switch within zone 1, 1300mm above bath or is that zone 2. the fan its is about a meter above bath.

SPARTYKUS · Sep 23, 2011

murdoch said:
imho the simple answer is yes. Extractor fans should always have means of "local" isolation.

Tin hat on!

fix bayonets!

oldtimer · Sep 23, 2011

Also if the fan duct is 1 metre long then use an axial fan if more than a metre use a certrfugal model

Octopus · Sep 23, 2011

i=p/u said:
is it bad to have fan switch switch within zone 1, 1300mm above bath or is that zone 2. the fan its is about a meter above bath.

Time to read the regs!!

i=p/u · Sep 23, 2011

i know.

MarkieSparkie · Sep 24, 2011

i=p/u said:
is it bad to have fan switch switch within zone 1, 1300mm above bath or is that zone 2. the fan its is about a meter above bath.

Hi i=p/u, That would be zone 1 then where only IPx4 (IPx5 if water jets) SELV switches are allowed. Or alternatively you could have a) an IPx4 (IPx5 if water jets) mains or SELV fan in zone 1 which has an integrated pull cord switch, or b) a pull cord in zone 1 with its associated switch (no IP requirement) mounted on the ceiling (above zone 1) outside the zones, if there's enough headroom.