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Re Lighting and Sockets from existing Power Supply

Former Community Member
Former Community Member
Basically this is a small office area on the ground floor of a structure which needs 6 13 A sockets one either side of the structure.There is an existing power supply that supples 110,230 and 400v to each floors but no power cable connection to the office area. So was wondering would I need to route a new cable (ie 16mm2 cable) from the existing 230v power supply than via 63A RCD and 32A MCB then from the 32A MCB cable a 2.5mm2 cable to the relevant sockets in order for them to get power to them. Also for lighting would the same apply here but using 1.5mm2 cable from a 6A MCB to light up 12 Sealed Strip lights.Now which is better to switch all lights on with one switch to all floors or to switch on each floor separately?. Would that mean either a Parallel or Series type circuit?Jimmy2Rivers
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  • JIMMY2RIVERS:

    But yet another week where you get no feedback on a problem.Just after wiring up sockets and lights surely you'd think someone has an idea from an existing power supply.

    Jimmy2Rivers


    First, there's a separate "Wiring and the Regulations" IET forum, so the people reading this (myself included) may not be qualified electricians.


    Second, your questions seem rather confused.  If you are lighting one office, why are you asking if all floors should be operated from one switch?  In another post, you have talked about the supply being from 2 x 4kVA transformers, but 32A at 230V is 7.3kVA.  This one office seems to need more power than one of the transformers can supply.  Anybody who is a qualified electrician is probably scared of answering any of your questions in case they are held responsible for the results.


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  • JIMMY2RIVERS:

    But yet another week where you get no feedback on a problem.Just after wiring up sockets and lights surely you'd think someone has an idea from an existing power supply.

    Jimmy2Rivers


    First, there's a separate "Wiring and the Regulations" IET forum, so the people reading this (myself included) may not be qualified electricians.


    Second, your questions seem rather confused.  If you are lighting one office, why are you asking if all floors should be operated from one switch?  In another post, you have talked about the supply being from 2 x 4kVA transformers, but 32A at 230V is 7.3kVA.  This one office seems to need more power than one of the transformers can supply.  Anybody who is a qualified electrician is probably scared of answering any of your questions in case they are held responsible for the results.


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