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Transcript
SOLAS
Electrical Course Notes - Unit 2.3.2
Industrial Socket Circuits
EN 60309 socket circuits in industrial premises may also be wired in radial or ring format. In
either case the load on the circuit must be assessed and the cables and protective device(s) must
be capable of supplying this load. Each socket should be individually protected against
overcurrent. The cables used must have a current carrying capacity equal to or greater than the
rating of the overcurrent protective device.
For example:
2.5mm2 conductors
20 Amp MCB
Circuits supplying socket outlets must be protected by an RCD with a rated tripping current
of 30 mA. There are some exemptions specified in the ETCI rules.
Rated Tripping Current
I N
( e.g. 30mA )
Contact Rated Current
IN
( e.g. 40A )
20
Revision 6, November 2013