Online assistance for electrical trade people Login  |  Register  |   Forgot Password
Assistance for electrical trade people
 

 

 

 


Click here to send Ron a pdf document for publication on this Topic

Documents must be less than 200k in pdf format

Posted By Topic: Define Relocatable, and Multiple circuits 1 cable

SafeSparky
Feb 02 2018 14:58

I need to supply power to 3x 3m2 sheds. They only need socket outlets, however some will have outside lighting also. I am trying to find the best/most economical way to do it, and I have a few questions about how. They will be potentially relocated at some stage so ideally I will connect them via 16a caravan plugs. I will be doing all wiring inside them and certifying the whole lot (as opposed to connecting to a prewired portacom)

1) Will they need to be inspected and given WoEF like caravans i.e. are they defined as relocateable. They are pretty much a small portacom.

2)What are my limitations on having lights connected with socket outlets on same circuit? I'd like to just give each shed just one circuit so that i don't have to install a DB in each one. I heard from a sparky I used to work for that it's ok to put a max of 2 lights on a socket circuit - although I haven't been able to find anywhere in the wiring rules that mentions this.

3) I'd like to provide power to these sheds via a 3core and earth neutral screen 6mm, and have one core supplying each shed. Is this compliant? If not, would having a 3 pole mcb protecting the cable make it compliant? (meaning that all circuits in cable must be isolated together, prevent live circuits being present inside an isolated fitting)
   

AlecK
Feb 02 2018 16:37

1)" Will they need to be inspected and given WoEF like caravans i.e. are they defined as relocateable. They are pretty much a small portacom."

Inspected, no; as it's not high risk PEW.
Issued WoEF, yes; if constructed as connectable installations.



2")What are my limitations on having lights connected with socket outlets on same circuit?"

None.

3) "I'd like to provide power to these sheds via a 3core and earth neutral screen 6mm, and have one core supplying each shed. Is this compliant? "

Yes, as each shed is a CI and not a separate "electrical installation"; and provided each socket for supply to a shed is on a different phase; and provided you set up a pillar complying with "3001" for supply to CI. However I think you mean 4C N/S, with the screen used as PEC rather than as neutral.

"If not, would having a 3 pole mcb protecting the cable make it compliant? (meaning that all circuits in cable must be isolated together, prevent live circuits being present inside an isolated fitting)"

No requirement for single means of isolation on a three-phase circuit to the pillar It's essentially a submain. But good practice.
   

SafeSparky
Feb 04 2018 15:42

Thanks Aleck, your advice is much appreciated :)