Log Cabin Installations

[ebow72]

Evening Guys, I have look for a similar thread on here and can't really find one that matches, so here we go again...

I have been asked to 'wire up' some log cabins that are for multipurpose. For instance, 'Garden Study', 'Ice Cream Booth' and a 'Holiday Home'...
The main of them are about 12-16ft by 8-10ft. Lighting and Radial circuit.
Now I am not sure, where in the regs this will be under, I am looking at 740 Temp Electrical Installations......
I can't be sure of the supply as it varies in location. As I say I have been asked to wire these up and previous to me doing it was someone who did the following...
NO RCD protected board, just some cheap plastic CU, with 100mA isolator and 2 breakers 6 (lighting) and 16 (Radial) amp.

It's supplied via a Industrial Plug and hooked up as per situation.

I have stated before I do any work, they use RCD protected boards. And I am sure in a instance like this they should use 'Additional Protection' , I could be wrong and all this is all right, but I am sure it's not...So all circuits will need RCD proctection..

If anyone can shed a bit of light on the subject, I will be very grateful. If I had a starting point in the Regs, that would be a start..

Cheers

Ian

 

[SPARTYKUS]

Sounds ok to me, personally wouldnt treat as temporary.... Most log cabins stay put!

32A radial...? Heaters and air con units can pop up later.

 

[Octopus]

Have you not been given a specification to wire to? If not I'd be ensuring that I agreed the spec before you start!

 

[ebow72]

I've been looking at section 717 in regs and this seems more suited. But still need to use RCD protection. Thanks for input.

 

[Specialist]

When you say Industrial plugs / sockets, is'nt there RCD protection at the supply point for these ?.

 

[ebow72]

No Spec given, just shown the cabin and told to get stuck in. Not sure of the final destination of any of the cabins, as yet. But assume RCD protection is there, but thought an RCD protected board in the cabin would be a good starting point.

 

[alarm man]

just tt it and get rid of the plug alot of these things can come pre wired id treat it as a fixed building..tho smoke fire/alarms are a must people are going to be sleeping in it

 

[Octopus]

No Spec given, just shown the cabin and told to get stuck in. Not sure of the final destination of any of the cabins, as yet. But assume RCD protection is there, but thought an RCD protected board in the cabin would be a good starting point.

Wow, put a 13A socket in, single light and charge £1K per cabin.

I can't believe they expect you to simply "get stuck in"!!!!!

 

[needasparks]

Agree with specialist on this. If i get the OP correct your just wiring these ready for others to use so surely the resposibility of supplimentary protection is down to the installer at end use. A recomendation of RCD protection should be at the point of conection as its use and supply origin cannot be guessed by you in construction.

 

[SPARTYKUS]

Good point needasparks

 

[Specialist]

No Spec given, just shown the cabin and told to get stuck in. Not sure of the final destination of any of the cabins, as yet. But assume RCD protection is there, but thought an RCD protected board in the cabin would be a good starting point.

Only problem is: If you fit an RCD now & it goes to a site that already has RCD protected supplies then how can you ensure Discrimination ? without a proper spec to work to & information on the site they're going to you could have problems.

 

[Chr!s]

CA2 springs to mind.

Regards Chris

 

[Big n Daft]

Non RCD CU and a note to say that the cabin must have an electrical supply that conforms to current regulations.
Its the customers problem to get leccy to it and fitting an rcd will create problems with discrimination, as pointed out by Speccy.

 

[ebow72]

Thanks all, what does CA2 mean by the way?

 

[Deleted member 26818]

"Shed a bit of light", like it.
I'd just wire it as a standard installation, and let whomever makes the final connection worry about TT, Zs, RCD discrimination etc.
Use a split load board, provide RCD protection for socket-outlets, and cables if required. Might want to consider using cables with an earthed sheath, if they're going to be concealed.