Gas Heaters In Roof

[Jimmyb]

Hello, Ive been asked to put supplies in for 3 gas heater that are bolted to the workshop roof, the cilent say he would like them on 13amp plugs but i didnt feel this was best really

Has any fitted circuits for these before ? if so what plugs or isolators did you use.

I was having a FCU near dis board for switching on and off but thought i will need isolation at the burner wont i ?

 

[Silly Sausage]

Wired in SWA to isolators on the roof.

 

[Jimmyb]

Wired in SWA to isolators on the roof.

so you had :-

dis board > swa > switch > swa > isolator > flex to unit.

i take it they didnt need a 3amp fuse as i was told but then again he wasnt sure.

Did you use 'c' breakers or are 'b' fine

 

[Silly Sausage]

so you had :-

dis board > swa > switch > swa > isolator > flex to unit.

i take it they didnt need a 3amp fuse as i was told but then again he wasnt sure.

Did you use 'c' breakers or are 'b' fine

I would, whatever you do inside to switch, then SWA for the external run & suitable outdoor flex.
Most likely a B I should imagine.

 

[markc123]

Don't you have any destructions with the gas heaters? Surely they must be some spec somewhere, as its impossible to say whether a 13amp plug or b/c type breakers are sufficient...althought with the brief description of the installation you gave i would also recommend a isolator.

To quote archy, i too think it would be a B-type (almost certain), cant ever imagine the pull on a gas heater to warrant a C, although i have no idea what size heater you're talking about.

I doubt you'd need SWA from the db to the switch would you? :S although without seeing the install, you could be correct.

A little more detail woulda been great buddy, but can't see a problem really, think you're slightly over-thinking things. Do as archy said.........albeit at your peril!!!

 

[Engineer54]

so you had :-

dis board > swa > switch > swa > isolator > flex to unit.

i take it they didnt need a 3amp fuse as i was told but then again he wasnt sure.

Did you use 'c' breakers or are 'b' fine

How many more times, the BS1362 fuse is there to protect the flexible cable, NOT the appliance/equipment the flexible cable(or other) is connecting to!! Any appliance or equipment that requires protection to internal circuitry, PCB's etc will be/should be provided by the manufacturer, not the installation electrician....

 

[Geordie Spark]

This sounds like one of those long steel pipes that's hung horizontally with a fanned gas burner firing in one end and a lue outlet at the other.

If that's the case, then a 3 amp fuse to protect the flex should be fine. All that's being powered is a fan & ignition & control circuitry. Maybe just provide a flex outlet with a fuse and a switch next to the heater so it can be isolated for maintenance purposes?

Edit: Is this any help to you?? ROBERTS GORDON ® Gas-Fired Heaters, Infrared Heaters and Infrared Heating Systems

 

[Knobhead]

This sounds like one of those long steel pipes that's hung horizontally with a fanned gas burner firing in one end and a lue outlet at the other.

Hope it's not a warm LOO outlet!

 

[Geordie Spark]

Hope it's not a warm LOO outlet!

Oh for ffffffffff's sake !!!!

 

[Jimmyb]

How many more times, the BS1362 fuse is there to protect the flexible cable, NOT the appliance/equipment the flexible cable(or other) is connecting to!! Any appliance or equipment that requires protection to internal circuitry, PCB's etc will be/should be provided by the manufacturer, not the installation electrician....

Extractor Fans need 3amp fuse

 

[Knobhead]

Extractor Fans need 3amp fuse

Try reading the thread.

 

[Engineer54]

Extractor Fans need 3amp fuse

Well were not talking about extractor fans here!! But even if we were, extractor fans come in all sorts of sizes, but i'm guessing your talking about small domestic examples. If the extractor fan NEEDS a 3A fuse then the manufacturer will be responsible for providing that protection. The BS1362 3A fuse will protect the 0.5mm cord supplying the extraction fan. Any coincidental protection, is just that, ....coincidental, and nothing else!!!

 

[Knobhead]

Well were not talking about extractor fans here!! But even if we were, extractor fans come in all sorts of sizes, but i'm guessing your talking about small domestic examples. If the extractor fan NEEDS a 3A fuse then the manufacturer will be responsible for providing that protection. The BS1362 3A fuse will protect the 0.5mm cord supplying the extraction fan. Any coincidental protection, is just that, ....coincidental, and nothing else!!!

That's true. The last fan I worked on was 400A @ 3,300V.

 

[Jimmyb]

most nearly all bathroom fans state in the instruction that the fan must be protected by a 3amp 1362 fuse

 

[Engineer54]

most nearly all bathroom fans state in the instruction that the fan must be protected by a 3amp 1362 fuse

I don't really care a rat's arse what the manufacturers instructions state, unless they are referring to protecting the factory fitted flexible cable. BS 1362 fuses weren't designed to protect the multitude of different appliances and equipments that can be connected to a power supply, certainly aren't going to protect anything with a PCB or other electronic controls!!

Ask yourself this, What do these fan manufactures state for units supplied to the rest of Europe and beyond?? No fused plug tops or fused connection units in these countries is there!!!!