rcd on three phase board

[m4fiaafg]

hello evryone, please can anyone tell me where a rcd be fitted on a three phase board. how would it be installed and what rating, please can explain as much as possible.

cheers everyone

 

[Mac]

Need more info mate.What is the RCD forI usually install RCBOs on 3 phase boards

 

[m4fiaafg]

basically i want to rcd protect a complete installation, not install single rcbos, to protect injdividul circuits.

 

[ian.settle1]

Fit it in an enclosure adjacent to the DB but would like to ask why do you want to protect the whole installation this way as if it tripped you would loose everything thereby making any fault finding if it tripped really difficult.

 

[Darkwood]

What make is the 3ph dist board you can usually replace main switch with rcd isolator on modern boards

 

[Mac]

Still don't know why you want to put an RCD main isolator on a 3 phase board.What exactly is on the circuit
New 4 Pole Rcd 3 Phase 100 Amp 30 ma Electrical RCCB on eBay (end time 06-Oct-09 18:02:44 BST)

 

[Guest123]

Agricultural premesis perhaps.

Socket outlets 30mA, ALL other circuts 300mA.

 

[m4fiaafg]

Agricultural premesis perhaps.

Socket outlets 30mA, ALL other circuts 300mA.

thats right mate its a agricultural premises, so i was hoping to protect the whole installation with a rdc

 

[Guest123]

Best have a read of section 704 in ol' red.

Socket outlets MUST have 30mA protection, then all other circuits have 300mA protection.

Easiest way is to have a 300mA RCD as the main incomer in the DB and then individual 30mA RCBO's for socket outlets.