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Daisy chaining extension cables? Current leaking to earth?

Discuss Daisy chaining extension cables? Current leaking to earth? in the UK Electrical Forum area at ElectriciansForums.net

linuxthefish

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Hi, I only have one socket to work with and adding others is not an option. Can I safely use an 1 socket 10 meter extension lead, with a 8 socket extension on the end? On the 8 socket extension i have a 6 socket extension lead (with another 1 socket extension) and and a 4 socket extension load. How many extension leads can I add before the 30mA RCD trips? Overloading should not be a problem, I have a 10A fuse in the 8 socket extension.

WALL SOCKET > 10 meter 1 socket extension lead > 8 socket extension > 4 socket extension + 6 socket extension cable (with 1 socket extension attached).

All that's plugged in is IT stuff, few laptops, audio amplifier, projector, fan, 2 40w lights, 3 monitors and a toaster sometimes.
 
Do you have access to a main switch to isolate in the event of an emergency ?

If the DNO fuse counts, then yes.

I get the impression the OP doesn't want to listen so I'm unsure why he asked in the first place TBH.

I'm more concerned about having the RCD trip or whatever, than overloading the 10A fuse in the socket. The cable near the plug has been shortened for anyone who is concerned, so it's not looped anymore :D
 
The RCD will trip if there is high earth leakage but if you are not concerned about over load then I am concerned ! Overload causes fire !! every time you add an extra extension lead the resistance is getting higher due to the connection between plugs and sockets and the length of cable Resistance means more heat more heat means fire !!!
 
The RCD will trip if there is high earth leakage but if you are not concerned about over load then I am concerned ! Overload causes fire !! every time you add an extra extension lead the resistance is getting higher due to the connection between plugs and sockets and the length of cable Resistance means more heat more heat means fire !!!

Sorry I may be having a blond moment but assuming the lead that is plugged into the supply socket is fused appropriately for all cables in the daisy chain (eg 13A rated all of them) then how can there be an overload risk? (I am assuming all unwound fully)
To me the issues are:
Disconnection times under fault (increased Zs value)
Volt drop
A serious effing trip hazard lol
 

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