shower spur???????

[macloon]

I know that showers should have an independent fuse, but was wondering if it would be possible to spur off the shower feed with a fused switch connection for 1 light above shower region. I would extend the lighting circuit but problem is the bathroom is below a flatroof and the joists run the wrong way to feed a cable over to desired area and the floor is tiled and cant be disturbed.

As it is only 1 light and shower is only 8.5 kw dont have to worry about overloading fuse, any advice would be much appreciated

 

[Deleted member 26818]

It's not normal, but as long as it's fused down it shouldn't be a problem.
How are you intending to connect the feed for the light to the feed for the shower?

 

[macloon]

I was going to spur off to a fused switch to control power to shower, then go up to light from that then back down to seperate switch for control of the light. Do you have any suggestions otherwise?

 

[telectrix]

you would have to spur to your FCU in 6mm or 10mm ( whatever the shower is wired in) as this cable is protected by the shower MCB/fuse. txhis would be best achieved by using an adaptable box for making the connections, as you can't fit 2 10mm cables in shower switch terminals. even if it's 6mm , you'd have trouble and potential of bad connections.

 

[dochisholm]

hi the shower if 8.5 kw should be pulling around 36a so a 40 amp supply would be optimal ensure the cable to the shower is sufficient. Ensure whatever you are isolating the shower with and what you decide to fuse down for the light are capable of this current.

 

[i=p/u]

adaptable box...?? you got a link ..??.

 

[oldtimer]

Sorry to disagree guys but I have just had to condem the exact circuit configuration the 6mm was terminated into a joint box with a 2.5 spurred off (4 metres) to a FCU because the joint was melted. My own preference is that the cooker and shower circuits should be dedicated because of the load issues OK its just a light but what next a couple of sockets protected by a 40 amp fuse cutting in or spurring off this type of circuit in my view is a no no

 

[telectrix]

1=pu, are you off the medication, mate?

 

[dochisholm]

i agree it is rough

 

[macloon]

yes showere is wired in 6mm

 

[telectrix]

Sorry to disagree guys but I have just had to condem the exact circuit configuration the 6mm was terminated into a joint box with a 2.5 spurred off (4 metres) to a FCU because the joint was melted. My own preference is that the cooker and shower circuits should be dedicated because of the load issues OK its just a light but what next a couple of sockets protected by a 40 amp fuse cutting in or spurring off this type of circuit in my view is a no no

but if he came off in the same cca cable to his FCU, not ideal, but if there's no other way?

 

[dochisholm]

i wouldnt do it my opinion ceiling down roof up or surface

 

[Deleted member 26818]

I was going to spur off to a fused switch to control power to shower, then go up to light from that then back down to seperate switch for control of the light. Do you have any suggestions otherwise?

My concern, is that if you were to break the feed to the shower for the FCU to the light, the terminals in the FCU would not be adequate for the shower current. The same would apply to the terminals in an adaptable box.
You are going to have to use some terminals that are rated for the shower current, perhaps a DP henly block with a short run of cable (less than 3m) to the FCU, or perhaps feed your FCU with a cable (again less than 3m) from the shower terminals.

 

[Chr!s]

you would have to spur to your FCU in 6mm or 10mm ( whatever the shower is wired in) as this cable is protected by the shower MCB/fuse. txhis would be best achieved by using an adaptable box for making the connections, as you can't fit 2 10mm cables in shower switch terminals. even if it's 6mm , you'd have trouble and potential of bad connections.

What about reg 433.2.1 or even 433.3.1(ii)

Sorry to disagree guys but I have just had to condem the exact circuit configuration the 6mm was terminated into a joint box with a 2.5 spurred off (4 metres) to a FCU because the joint was melted. My own preference is that the cooker and shower circuits should be dedicated because of the load issues OK its just a light but what next a couple of sockets protected by a 40 amp fuse cutting in or spurring off this type of circuit in my view is a no no

I agree with spin, terminations and accessories need to be suitable

 

[mechelec]

I cannot find it now but is there not a regulation that allows reduced CSA of spur cable if it is not liable to be damaged and protected by a fuse of suitable value.