Shed supply

[44ALLAN]

There was a period (and probably now) when firms ran an earth wire alongside the swa because they were ignorant and did not know that 99.9 + per cent of the time the armour complied.

Earth wire alongside is waste of time and effort.................dedicated earth core inside swa every time.
Armour can then be back-up earth if required when bonded correctly......... they compliment each other /earth and bond all at the same time........canny Zs reading too .

 

[davethsparky]

So you install 5core for tp sub mains do you?

 

[44ALLAN]

So you install 5core for tp sub mains do you?

Yup every time I'm afraid........................

edit.

I'm not saying using the armour is wrong btw.
Each to their own it's just the way I do it

 

[44ALLAN]

3 phase motor gets a 4 core too....................so i can put the earth core onto the nice internal earth connection in the motor terminal box that the manufacturers provide

 

[davethsparky]

How much more does it cost to do that? I'd have thought there's going to be a big price difference for adding an extra core, especially when 5core isn't all that commonly used.

Motors is different because you only just flexible cables for the final connection so there isn't a suitable armour.

 

[44ALLAN]

Motors is different because you only just flexible cables for the final connection so there isn't a suitable armour.

Don't know why you would think that mate?
I've taken armoured cable direct to the motor terminal box thousands of times!

 

[telectrix]

@ OP. go to jail. do not pass go. do not collect £200. buy some bloody 6mm 3 core SWA. you say you are going to have a garage at a later date. so install to accommodate the additional load you will require then. feed from a non-RCD way in the house CU then install a garage CU in the shed.

 

[44ALLAN]

SWA as a CPC

Heres a great article for those that haven't seen it............enjoy

 

[7029 dave]

Why wouldn't you trust it? There's nothing wrong in using the armour as long as it's been correctly sized and the chances of it coming out of a gland are nil as long as it's been done correctly.
What are your thoughts on conduit or trunking as a cpc?

When I was working on big projects, hospitals schools factorys, we had to pull in cpc's, it was spec on conduit work and trucking.

 

[robsparky1975]

how the frack do you use plastic conduit as cpc?!

Paint it green n yellow lol

 

[RWJ]

Paint it green n yellow lol

PMSL....... I'm sure some would try using it as a CPC if they sold G Y conduit lolololololo

 

[overskilled]

Tel: Garage is going at the other side of the garden and about half the distance from the house compared to the shed (garden is a damned odd shape), electrical materials already bought for the garage (though have my eye on a nicer CU). Thats what I had in mind anyway for the garage - 6mm2 3 core SWA buried under the gravelled drying green (SWA is currently looped up waiting on the council to get back to me on "garage design guidelines", already told me they want it fireproof....which means either block work or if its timber /steel framed - fibre cement/metal cladding externally AND internally plasterboarded walls....its a detached garage...not a house....they asked what I would do if it caught fire....grab a hose/run for it - depending on the severity of the fire...I'm near certain the framework would withstand fire for more than long enough for me to escape...but thats another point entirely......)
Shed is always just going to be a store room, so given that going to fuse the supply down to 13 amps, double socket in the shed, SFCU to run a single light.
Yes I'm aware it was a daft question I asked at the start of this thread.....I think I'll go off and lurk oncemore....

 

[davethsparky]

Motors is different because you only just flexible cables for the final connection so there isn't a suitable armour.

Don't know why you would think that mate?
I've taken armoured cable direct to the motor terminal box thousands of times!

Because its what I was taught, think it features in the regulations somewhere or at least one of the guidance notes and also gets referred to quite often on this forum.

Doing something thousands of times doesn't automatically make it right, it can mean you've done it wrong thousands of times.

Hopefully someone else will see this and be able to confirm either way

 

[44ALLAN]

Because its what I was taught, think it features in the regulations somewhere or at least one of the guidance notes and also gets referred to quite often on this forum.

Doing something thousands of times doesn't automatically make it right, it can mean you've done it wrong thousands of times.

Not sure if I'm understanding what your saying here to tell the truth.
Taking the Swa direct to the motor terminal box and connecting it there with the correct gland is normal mate believe me
Quite a few have threaded entries too so it seems a shame not to use them.

Are you saying you've been taught to gland the swa into a terminal box then use flex to go to the motor terminal box?

 

[davethsparky]

I am saying I was taught that only fine stranded/flexible cables are able to withstand the work hardening effects of the motors vibrations.