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LED lamp startup currents and MCB/RCBO

psychicwarrior

Hello forum , good day to all

Accepting it can be a bit more involved science wise, but will any of you please share [if you use/have] a general/simple ‘formula’ or 'rule of thumb'  for working out how many LED lamps that a MCB/RCBO Type B or C of some rating is able to switch and not end up nuisance tripping on same-time startup  ?

 

Regards

Habs

 

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    I have found a FAIRLY reliable rule of thumb is not to exceed 10% of the nominal capacity of the circuit, for lamps switched in groups.

    So a standard 6 amp lighting circuit is good for about 1,380 watts of incandescent bulbs. So by this rule of thumb it should be good for about 140 watts of LEDs. That is a lot of LED lamps.

    Another approach that will often give a similar result, is to size lighting circuits by the old rule of a “100 watt lamp for each light” even if LED lamps of much lower wattage are to be used. That would give a limit of about 13 or 14 lamps on a 6 amp circuit.

     

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    I have found a FAIRLY reliable rule of thumb is not to exceed 10% of the nominal capacity of the circuit, for lamps switched in groups.

    So a standard 6 amp lighting circuit is good for about 1,380 watts of incandescent bulbs. So by this rule of thumb it should be good for about 140 watts of LEDs. That is a lot of LED lamps.

    Another approach that will often give a similar result, is to size lighting circuits by the old rule of a “100 watt lamp for each light” even if LED lamps of much lower wattage are to be used. That would give a limit of about 13 or 14 lamps on a 6 amp circuit.

     

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