DB Height

[ians]

OCPD = over current protective device ie circuit breaker that trips at a predetermined current or could even be a fuse. Some earth leakage breakers don't offer over-current protection, only earth leakage protection.

In most cases...Over current protection is not required in domestic installations...the breaker feeding the DB would generally be a 50 or 60 amp...the cable feeding the db will be a 10 or 16 mm...which protects the cable and the tails from the earth leakage to the top of the breakers.

Over current protection is "generally" only required in larger 3 phase DB's where there is earth leakage on each phase fed from a supply rated higher than 60 amps....in which case you would fit a 60 amp circuit breaker before the earth leakage.

[Ishmaelmo]

Thanks everyone. I really learned a lot.