hi all,
Can anyone provide a worked example of rating a breaker for a circuit.
For example
In an industrial environment, we have our own HV supply and each substation on site has its own earth rod. I assume this falls in to a TT system.
if I wired (14) 8watt lights in parallel back to a DB.
The inrush of the lights together is 2000VA
The length of the cable is 60Meters
1.5mm fp 200
12.10 milli ohms per meter
29mva/m
ambient of 45 degree (derating of 0.79)
Concealed in trunking
I would like to calculate was size breaking capacity device I require....
Helppppppppp
Can anyone provide a worked example of rating a breaker for a circuit.
For example
In an industrial environment, we have our own HV supply and each substation on site has its own earth rod. I assume this falls in to a TT system.
if I wired (14) 8watt lights in parallel back to a DB.
The inrush of the lights together is 2000VA
The length of the cable is 60Meters
1.5mm fp 200
12.10 milli ohms per meter
29mva/m
ambient of 45 degree (derating of 0.79)
Concealed in trunking
I would like to calculate was size breaking capacity device I require....
Helppppppppp