All,
i LIve WITH a TT earthed system, thus struggle to meet 50v required disconnection times due to Ze value (around 15 ohms).
if you split the incoming supply on tt, are you required to provide
1) RCD protection only
2) Overcurrent protection only (with RCD protection at the submain consumer unit)
3) RCD and overcurrent protection (60a BS88 Fuse).
The submain routes underfloor, is 16mm t+e and supplies an annexe after a 25 meter run of cable.
Thanks in advance.
i LIve WITH a TT earthed system, thus struggle to meet 50v required disconnection times due to Ze value (around 15 ohms).
if you split the incoming supply on tt, are you required to provide
1) RCD protection only
2) Overcurrent protection only (with RCD protection at the submain consumer unit)
3) RCD and overcurrent protection (60a BS88 Fuse).
The submain routes underfloor, is 16mm t+e and supplies an annexe after a 25 meter run of cable.
Thanks in advance.