fluorescent fittings ?

[j.capes]

Hi all. Installing a circuit with 7 double 5' tubes. Would this need to be a C type breaker for start up current or would I be ok with a B? Thanks

 

[alpha spark]

More info required I'm afraid Mains characteristics type of wiring length of run does it need to go on a rcd where is this garage kitchen etc etc etc

 

[Nicky Tesla]

7 x (58x2) = 812w

812w x 1.8 = 1462w

P = IV

I = P/V

1462/240 = 6.1A

Should be ok on a 6B as start up will not be excessive. But are other lamps on the same circuit if so check out the 6A c curve.

 

[kerching]

Switch start or HF...makes a difference........ :coat

 

[steptoe]

7 x (58x2) = 812w812w x 1.8 = 1462w

P = IV

I = P/V

1462/240 230 = 6.1A 6.36

Should be ok on a 6B as start up will not be excessive. But are other lamps on the same circuit if so check out the 6A c curve.

small error nicky,,,

 

[Nicky Tesla]

Most places i go have a reading of at least 240, can be 248 for eg.

The "actual voltage" is best to make your calculations.

 

[steptoe]

I did forget the

sorry,

 

[j.capes]

This is all that's on the circuit and max length to furthest fitting is approx 25m (small studio theatre space - Not domestic)Installation is 1.5mm Pyro / singles in metal conduit and supply earthing system is TN-C-S. I'm gonna go for 10A Type B MCB. Anything else please shout. Thanks for your help.

 

[septiclecky]

Most places i go have a reading of at least 240, can be 248 for eg.The "actual voltage" is best to make your calculations.

But the supposed harmonised voltage to be used is 230v