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Socket Outlet Continuity

Former Community Member over 3 years ago

Hi,

This is my 1st post so please be kind to me........ ?

Whilst carrying out Ring Main Continuity either r1-rn and/or r1-r2 I have been getting differing results at various sockets by way of the plug top tester. The ring tests out fine when using probes on the back of the sockets. For example the healthy r1-rn was 0.4. At some sockets using the plug top test a double socket would give me 0.6 onside and 1.10 on the other - but all OK testing from the terminals at the rear.

I understand that this is probably down to lack of use - is there any limit to the losses through the socket.

They all tested out OK doing Zs.

Am I being over cautious?

Many thanks

Parents

0 Legh Richardson over 3 years ago

I would agree that measuring the continuity through the sockets will offen give varying results, in my case as much as 0.2 Ohms between two oulets on the same accessory. I always put it down to manufacuring tolerances getting progressively worse the cheaper the accessory. It appears that the lack of quality products is spreading......

The other problem is that most if not all socket outlets are protected by RCDs. These device do not like being zapped with 25A pulses but prefer a 15mA current that is electronically adjusted. Where there is any form of pattener acculmanated between the socket and plug there will be a slight change in resistance.

IMO on initial installation connect socket outlets and take measurements before attaching the plates to the backing boxes; for reports take samples or, if time and ecconomics allow, disconnect the plates before taking measurements

Legh
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0 Legh Richardson over 3 years ago

I would agree that measuring the continuity through the sockets will offen give varying results, in my case as much as 0.2 Ohms between two oulets on the same accessory. I always put it down to manufacuring tolerances getting progressively worse the cheaper the accessory. It appears that the lack of quality products is spreading......

The other problem is that most if not all socket outlets are protected by RCDs. These device do not like being zapped with 25A pulses but prefer a 15mA current that is electronically adjusted. Where there is any form of pattener acculmanated between the socket and plug there will be a slight change in resistance.

IMO on initial installation connect socket outlets and take measurements before attaching the plates to the backing boxes; for reports take samples or, if time and ecconomics allow, disconnect the plates before taking measurements

Legh
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Socket Outlet Continuity

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