Interconnection

[schoe]

Hi all could someone explain to me what an interconnection is and how to find one,


Thanks chris

 

[Knobhead]

In what respect?
Domestic, industrial, distribution or the national grid.

 

[schoe]

In what respect?
Domestic, industrial, distribution or the national grid.

Domestic?

 

[Knobhead]

An interconnection can be anything, a simple link in a light switch is an interconnect. The classic is a shared neutral in a lighting circuit. That would be unintentional, intentional are more common in industry. Two switchboards may be interconnected to give a backup supply. The interconnect would not normally be switched on, but if needed it’s there.

This shows the interconnections on the EMPower training rig in Nottingham

View attachment 9326

 

[Richard Burns]

I think, from your End to End testing on cpcs post, that you are asking what an interconnection or bridge is on a ring final circuit.

This is a situation where there is the normal ring circuit and at some point a cross connection, usually from one socket to another, is made across the ring effectively introducing a so called ring within a ring.

This can be a dangerous situation as the ring will test and function almost normally but may well introduce a problem with excess current flowing through one part of the ring overloading the cable.
This is much worse if if there is a disconnection at one point in the ring.

If the ring within a ring is all complete then you can only detect this by estimating the expected resistance of an end to end measurment for the expected or estimated length of the ring and seeing if your measured value is lower than this.

If there is a break in one part of the ring then the figure eight measurement will be significantly different at certain points where the ring is broken but "correct" where the ring is not broken.

 

[Knobhead]

Sorry, got my heavy head on

View attachment 9328