- Reaction score
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HELLO ALL
i am changing over a cu.
i have conducted basic testing before deciding to change over to a dual RCD wylex 17th ed board.
The board's RCDs and main switch were prewired.
The neutral cable comes out of one rcd and into another and out again from the same terminal and directly back to main switch.
Although i prefer to have the neutral wires fixed directly to the no protected neutral bar and from their to the main swtich i decided to go with the wylex set up.
with all mcb off i energize the board and one by one engineered both RCDs,
then started to energize each mcb.
However weirdly 4 out of 6 of the mcbs tripped the RCD which was not protecting them?
Is this a phenomenon that any one else has encountered?
Tomorrow i will retest each circuit to confirm integrity of insulation resistance and confirm no current leakage to earth and confirm i have wired all circuits correctly to each protected neutral bar.
Also Ill probably seperate the neutral cables and connected them all to the unprotect bar and then back to the main switch.
However i would like to know your ideas as to what may be causing this weird tripping?
thanks very much for you time in this matter.
DD368
i am changing over a cu.
i have conducted basic testing before deciding to change over to a dual RCD wylex 17th ed board.
The board's RCDs and main switch were prewired.
The neutral cable comes out of one rcd and into another and out again from the same terminal and directly back to main switch.
Although i prefer to have the neutral wires fixed directly to the no protected neutral bar and from their to the main swtich i decided to go with the wylex set up.
with all mcb off i energize the board and one by one engineered both RCDs,
then started to energize each mcb.
However weirdly 4 out of 6 of the mcbs tripped the RCD which was not protecting them?
Is this a phenomenon that any one else has encountered?
Tomorrow i will retest each circuit to confirm integrity of insulation resistance and confirm no current leakage to earth and confirm i have wired all circuits correctly to each protected neutral bar.
Also Ill probably seperate the neutral cables and connected them all to the unprotect bar and then back to the main switch.
However i would like to know your ideas as to what may be causing this weird tripping?
thanks very much for you time in this matter.
DD368
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