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55v - 110v centre tap transformer short circuit calculations

Anthony Sullivan

hello

i have been trying to work out how to work short circuit calculations for 110v systems. do i use 55V with c max or do use 110v or even use a 3phase calculation. i am trying to work out if a circuit will trip on 16A c type mcb for short circuit as i am putting a rcbo in to cover the fault current. 

110v 55v 

0.85ohms line to line tested

4mm 2 core cable 

 

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    i was considering the potietial fire from mcb not tripping before the cable heats up. but looking at it the mcb for the cable size will trip in time. i think the regulations make it a little confusing. really the best soluotion would just be a rcbo in the socket as its the easy location for it. 

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  • 0

    i was considering the potietial fire from mcb not tripping before the cable heats up. but looking at it the mcb for the cable size will trip in time. i think the regulations make it a little confusing. really the best soluotion would just be a rcbo in the socket as its the easy location for it. 

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