Spur from 32MCB

[Ashley-Joseph]

Just wondering if I got this right but is it ok to take a 2.5mm spur from a 32MCB ring main Or should I use 4mm cable.

 

[Bellendian]

I see plenty of EICRs stating that 'multiple circuits' are connected into 1 breaker and need rectifying. On inspection it's often just a spur taken from ring at MCB and no issue at all!

 

[Deleted member 9648]

I see plenty of EICRs stating that 'multiple circuits' are connected into 1 breaker and need rectifying. On inspection it's often just a spur taken from ring at MCB and no issue at all!

This is a common misconception, 'multiple circuits' in one MCB is an impossibility by definition. If there is one point of connection to a protective device at the source of supply it is one circuit no matter how many cables are connected.

 

[j1mbodrea]

Just wondering if I got this right but is it ok to take a 2.5mm spur from a 32MCB ring main Or should I use 4mm cable.

Suprised no one has asked what your design current will be ???