Is a Fan isolator required

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John robertson

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• May 10, 2018

• #1

Hi guys you've likely had this asked a lot on here. I have been asked to fit a extract fan wi timer in a bathroom for a friend, i have told him he should get a fan isolator but is adamant he does not want one for some reason (for all it would cost). Is it still ok and safe for it to come on with the light?

 

MFS Electrical

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• May 10, 2018

• #2

John robertson said:

Hi guys you've likely had this asked a lot on here. I have been asked to fit a extract fan wi timer in a bathroom for a friend, i have told him he should get a fan isolator but is adamant he does not want one for some reason (for all it would cost). Is it still ok and safe for it to come on with the light?

Click to expand...

The fan should have a triple pole isolator as it’s a timer fan to be able to isolate for mechanical maintenance (taking off the cover and cleaning it) it would also contravene building regs here in Scotland so my gut instinct would be talk him into it or walk away...

 

Gavin John Hyde

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• May 10, 2018

• #3

Does approved document f apply in scotland?
Down here it covers the airflow rates required when fitting to an existing building then you must not leave it any worse than it was before hand.

 

Loki

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• May 10, 2018

• #4

Bet the manufacturer instructions say to have an isolation switch fitted.

 

buzzlightyear

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• May 10, 2018

• #5

Loki said:

Bet the manufacturer instructions say to have an isolation switch fitted

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some do ,and some don't .

 

O

Octopus

• May 10, 2018

• #6

So we follow BS 7671 in existing properties for maintenance ...... Part F isn't relevant

BS 7671 says nothing on the subject if my memory serves me correctly..

 

robd

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• May 10, 2018

• #7

Can you put one in the loft I often do this with inline fans for example next to the unit.

 

Wilko

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• May 10, 2018

• #8

Hi - I plan on fitting a local means of isolation for fixed appliances. This is often in the manufacturer's installation instruction as @Loki has mentioned. This is one for a common bathroom fan I've used .

 

Dillb

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• May 10, 2018

• #9

A MCB or fuse will act as isolation too. The only reason local isolation maybe required would be so the light stays on while carrying out any maintenace on it.

 

telectrix

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• May 10, 2018

• #10

Dillb said:

A MCB or fuse will act as isolation too. The only reason local isolation maybe required would be so the light stays on while carrying out any maintenace on it.

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think that requirement came out when we had candles fitted to out hard hats rather than head torches.

 

MDJ

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• May 10, 2018

• #11

Nice to have an isolator though, especially if the fan fails and it is winter. If you turn the circuit off without one and the torch has no batteries it is a hard job to change one lol

 

O

Octopus

• May 10, 2018

• #12

MDJ said:

Nice to have an isolator though, especially if the fan fails and it is winter. If you turn the circuit off without one and the torch has no batteries it is a hard job to change one lol

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Most people have mobile phones with torches ..................

 

Dave OCD

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• May 10, 2018

• #13

Why do some forum members argue so fiercely against common sense when something isn't strictly required by BS7671, bear in mind this is the minimum standard that we have to conform with.

 

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• May 11, 2018

• #14

No ones arguing, just stating different points and how it can be resolved in different ways. Theres no hard and fast rule for a local isolator, so much like BS7671 its open to interpretation.

 

Andy78

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• May 11, 2018

• #15

Dave OCD said:

Why do some forum members argue so fiercely against common sense when something isn't strictly required by BS7671, bear in mind this is the minimum standard that we have to conform with.

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The question asked was "is one required ?"
The question is only being answered truthfully and accurately. If it's a question of requirements then the minimum standards are relevant.

If the question was "is it best to have one ?" then answers might have been different.