2 x portable work cabin

[baazab]

Hi everyone need help pls

I need to power 2 x portable work cabin

The meter people came today installed new supply with one meter 25 meters away from the 2 cabin

Each cabin have 3 heaters sockets lights

My question is what size Swa cable can I use

Cable length 35 meters from meter box

 

[westward10]

TN-C-S is not prohibited on a construction site, see 704.411.3.1.
As for the cabins I view Section 717 as cabins which are constantly on the move, cabins on construction sites can stay there for years.

 

[loz2754]

I agree that a cabin used as a canteen does not fall under 704 Construction Sites.

I also agree that under Section 717, Mobile Or Transportable Units, a PME supply may used, if the installation is continuously under the supervision of a skilled or instructed person. It could easily be argued that, as the cabin is associated with a construction site, it is therefore under such supervision.

 

[baazab]

We going to far on this job I need experience electrician to say run the cable put another rod if I have to and get powered
Even if I have to pay him for his correct advice I don't want see section numbers ,

If it can't be done then I just going to pull out

Im sure someone will come and give the correct way

 

[loz2754]

I would suggest in that case that you go ahead pull out, if you're in over your head.
Unless it's possible for a more senior electrician to mentor you on site?

 

[goasis]

I dread to think what the wiring in the 14 houses would look.like if this is such a tricky concept for him to get his head round....

You don't want to see section numbers?!! So what your actually saying is you can't be bothered to educate yourself on this, you just want someone else to do the thinking for you and give you free advise?

 

[davesparks]

TN-C-S is not prohibited on a construction site, see 704.411.3.1.
As for the cabins I view Section 717 as cabins which are constantly on the move, cabins on construction sites can stay there for years.

I thought ESQCR prohibited TNCS on construction site?

 

[westward10]

I thought ESQCR prohibited TNCS on construction site?

Without looking I'm pretty sure it's just caravans and boats.

 

[Rockingit]

I thought ESQCR prohibited TNCS on construction site?

Nope. Although as Westward just said, it does specifically mention caravans and boats (9.4)

 

[davesparks]

Without looking I'm pretty sure it's just caravans and boats.

Nope. Although as Westward just said, it does specifically mention caravans and boats (9.4)

Ah OK, I must be thinking of UKPNs internal specs.

 

[baazab]

I dread to think what the wiring in the 14 houses would look.like if this is such a tricky concept for him to get his head round....

You don't want to see section numbers?!! So what your actually saying is you can't be bothered to educate yourself on this, you just want someone else to do the thinking for you and give you free advise?

Hi everyone I don't want to you to understand wrong off course I want to follow and respect the Bs7671 all I'm asking is help from the boys who's doing this all day long
I all ready put my hands up and said I'm domestic never worked in this field ,if I knew all this I wouldn't ask for help

House rewire is easy for me I do it all day long

We all have to respect each other and work forward

 

[baazab]

Goasis pls pls if you can help and you want money for helping tell me I will forward to you
If you just want to talk bad pls don't as we not going to achieve anything
Manythanks

 

[nicebutdim]

Thank you
Will have to wait and see what the big electricians going to advice me

For example if they say use 2 x 16mm swa to each one this mean I need second electrical box next to the meter with small fusebox to glan the 2x Swa .

I'm confused

That would be the easiest way, enclosed in some sort of weatherproof structure which the builders will probably be happy to make. Then run appropriate circuit to each cabin.

 

[Aaron b]

I can't see how section 717 can't apply it lists transportable as containers and cabins and lists welfare units. They are designed to be transported.

If it's pme TT it. If it's a 32 amp plug or under it needs a rcd anyway.

Prysmian do a free cable app that may help start you off with the right size cable.

 

[UNG]

Goasis pls pls if you can help and you want money for helping tell me I will forward to you
If you just want to talk bad pls don't as we not going to achieve anything
Manythanks

If you post your location there may be a member who is local that can help you out

 

[timhoward]

I can't see how section 717 can't apply it lists transportable as containers and cabins and lists welfare units. They are designed to be transported.

I don't want to start a huge diversion on this topic but this does seem to be an area where different sparks have different interpretations both as to what's in scope, and what constitutes continuous supervision by skilled or instructed people. If you look back at previous threads it's been discussed before on this forum and the iet forum.

I have some sympathy for the argument that the more structures move, the more relevant section 717 is. For example an outside broadcast unit (in a past life I drove one and was the resident engineer) could move every day and be connected to a different supply daily. That is a good example of something being under continuous supervision too. Which is handy as banging an earth rod in at every venue for the antiques roadshow isn't really practical!

Even if this section was in scope, it's been pointed out there is likely to be someone skilled supervising things on a construction site. So PME would be allowed.