connecting to 3 phase dis board

[mr_t]

Hi all....


I have installed a PIR floodlight at my industrial unit, there is a 3 phase dis board with single mcb's labelled L1, L2, L3.

I'm assuming the Live goes on to any of the spare mcb's - but can anyone advise where the neutral connects to, there are three connecting blocks under a cover labelled "neutral" - does it matter which one the neutral goes to or are they common? Likewise is it a common earth?


And if it is a job for a qualified sparky then tell me that too!

 

[breezer]

qualified spark.

even though its your place, insurance says must be sparks as its commercial

 

[AdamW]

Plus with your livelihood at stake if you burn it down, not really worth the risk!