Lightning

Discussion in 'Electricians' Talk' started by shouldvgotamanin, Oct 24, 2003.

  1. shouldvgotamanin

    shouldvgotamanin New Member

    My RCD protected CU trips the RCD during thunderstorms. It was replaced during recent extension work as the old one (allegedly) tripped too slowly. This CU serves all rings and power (lighting is on a second unprotected CU) and one day this will happen when I'm on holiday which will be great for my freezers. We have a PME earth system and properly installed rings (no spurs) etc. How can I avaoid having to install dedicated fridge/freezer circuits to the non-rcd CU. PS my meter is rated at 45A. I recon I draw a tad more than that. Should I worry?
     
  2. Brightspark

    Brightspark New Member

    In my experience I have not come across an abundance of RCD's tripping after a lightning storm.
    I know when it strikes the power lines you sometimes have a dip in supply but there are LPS systems (lightning protection systems) in place to avoid this.
    Maybe your system has some earth leakage on it at present but not enough to make it trip, have it tested at 1/2 rating see what happens
     

Share This Page