J
joeyscurlock
I might be COMPLETELY wrong.... but I have recently finished my level 3 in college and I'm sure I was told that if a Zs value is higher than the max reading in BS7671 it's okay if it's protected by a 30mA RCD, so it passes. I sort of remember writing 'satisfactory' on the test form next to Zs reading that are protected by RCD then checking results against circuits not protected by an RCD. The lads I work with are determined that's not true because RCDs protect against earth leakage and MCBs protect against overload and Zs readings are for overload.. Which i also thought was wrong because I thought Zs is earth fault loop path which ties in with RCD protection. I'm not certain because of the experience they have compared to me, but i'm sure some of what i've said is true.
If anyone could answer this for me that would be great.
If anyone could answer this for me that would be great.