T
timmy123
I was called to an installation today following a PIR/ EICR done by a contractor. The contractor had advised the client to have a 3rd phase installed as the existing 2 phases are drawing around 95 amps each on full demand and the contractor has adviseed the client that this poses a danger due to fire risks/ overheating of the supply cables !. Each existing phase is protected by a 100amp 1361 type 2b cut out fuse. My understanding is that if all is as it should be then a demand of 95amps where there is a 100 amp fuse should not cause any problems. The client has been experiencing incandescant light flickering and ballast type flourescent light fittings periodically going off for a few minutes and then coming back on. The client has also commented that a historic electrical check indicated voltage fluctuations on the 2 phase DNO supplies to the building. The client is not planning to install any other electrical equipment. The DNO tails are 25mm csa.
My conundrum is whether a 3rd phase will solve his flickering problems or whether there is an inherent problem somewhere in the supply lines which will still exist even if a 3rd phase is introduced. The client is concerned about the cost of having to have a 3rd phase installed.
Does anyone have experience of a similar type of problem. Any comments on any aspect of what I have noted would be most welcome.
Many thanks
My conundrum is whether a 3rd phase will solve his flickering problems or whether there is an inherent problem somewhere in the supply lines which will still exist even if a 3rd phase is introduced. The client is concerned about the cost of having to have a 3rd phase installed.
Does anyone have experience of a similar type of problem. Any comments on any aspect of what I have noted would be most welcome.
Many thanks
