Bathroom Fan Fused at 3Amps

[ianphilip007]

Hello Guys

Just a quick question re Bathroom Fans and that some manufacturers state that they are to be supplied from a 3 Amp FCU

i have two Quries really that i just need clarification on if anybody can help.

1/ when the bathroom lighting is on a loop circuit ( and is supplying another room from the rose) Does the loop out from the bathroom rose have to be fitted to the supply side of the fcu and then onto the next light

2/or is it acceptable to leave it in the rose loop in even though the lights that it will supply will now be fused at 3A instead of 6A

 

[ianphilip007]

just to add the fcu (3amp) is on the incoming lighting supply to bathroom. option 1 above is the correct way as per regs, just wondered if option 2 would also be acceptable

 

[saveloy]

Option2 not good practice IMO.

 

[ianphilip007]

yes thats what i thought, would work but not happy that the rest of the lighting circuit onwards from bathroom would be rated at 3 amps. thanks saveloy
ill keep to option 1

 

[Johnny-G]

With option 1, the loop for the next room doesn't have to come from the FCU at all, it can stay at the rose.

 

[ianphilip007]

but johnny if the supply to the next room is left at the rose it would be fused down to 3amps via the fcu, and if the fan were to develop a fault it would also take out all lighting supplied from the bathroom rose. by running the loop from the fcu this is avoided would you agree.

 

[malcolmsanford]

Are you talking about fitting a RCD FCU into the loop feeding the bathroom so that the circuit wiring the bathroom then as RCD protection?

 

[ianphilip007]

no just a normal fcu (3amp) to fuse lighting circuit down to 3amps for timer fan (as manufactures ins) Rcd protection provided at CU for entire lighting circuit. only wanted the fan and bathroom light to be fused down to 3amps, so running the loop out of the bathroom rose to supply side of fcu.

 

[malcolmsanford]

Ok Ian so now why do you want the batrhroom light to come off the FCU and be fused at 3amp ?

 

[ianphilip007]

the fan im installing is a timer fan so i obviously need a swL,L,N. taking this from the bathroom rose to 3 pole isolator and then onto the fan. The manufacturer insists that the supply to the fan has to be fused at a max 3Amp rating. so if i insert a fcu(3a) on the bathroom lighting supply the fan will be fused down to 3 amps asits supply is fed from the bathroom rose. hope that makes sense

 

[Darkwood]

Souza619.... If you wish to advertise you need to become a forum sponsor .... its not a free service we provide as a forum, please contact the moderators to assist you if you wish to advertise or post links to companies websites.

 

[Engineer54]

the fan im installing is a timer fan so i obviously need a swL,L,N. taking this from the bathroom rose to 3 pole isolator and then onto the fan. The manufacturer insists that the supply to the fan has to be fused at a max 3Amp rating. so if i insert a fcu(3a) on the bathroom lighting supply the fan will be fused down to 3 amps asits supply is fed from the bathroom rose. hope that makes sense

I'll say it again, ....if the fan/timer ''NEEDS'' fusing down, then it should be provided and incorporated by the manufacturer of the unit. FCU fuses are NOT there to provide protection for equipment and accessories, they only provide suitable protection for cables/flex's!!

 

[ackbarthestar]

I couldn't agree more. Overload protection is the responsibility of the manufacturers.

If a fan needs to be protected by a 3A cartridge fuse then it says a lot about the confidence of these fan manufacturers.

There is some complete rubbish around in the market place

 

[Guitarist]

Agree with the above. However, when we are being told that to comply with regs we HAVE to supply via 3 amp fuse, and an electrician even went to prison when he didn't do so (regardless of whether a 3 amp fuse would have prevented the fire), it puts us between a rock and a hard place.

 

[Octopus]

The way I look at this issue is if the customer wants or needs a fan and the fan needs fusing down, then its longer to install and more parts to mark up.

In one word more "money"