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WayneL
Hi Guys,
I'm taking the 17th Edition course at the moment and I've come across a bit of a puzzler.
Table 41.5, page 50 of the Regs, gives the maximum Zs for a TT system to ensure RCD operation.
The question is this:
Why is the value for a 30mA RCD, at a voltage of between 230v and 400v, (column 3) given as
1533 ohms, when for all other voltages, both higher and lower, the max Zs is 1667 ohms?
Unfortunately I'm one of those people who won't just accept something, so I need to figure this out.
Any suggestions will be greatfully received.
Cheers,
Wayne
I'm taking the 17th Edition course at the moment and I've come across a bit of a puzzler.
Table 41.5, page 50 of the Regs, gives the maximum Zs for a TT system to ensure RCD operation.
The question is this:
Why is the value for a 30mA RCD, at a voltage of between 230v and 400v, (column 3) given as
1533 ohms, when for all other voltages, both higher and lower, the max Zs is 1667 ohms?
Unfortunately I'm one of those people who won't just accept something, so I need to figure this out.
Any suggestions will be greatfully received.
Cheers,
Wayne