Home & Garden1 min ago
Extending Lighting Ring Main Into Loft
I want to extend my upper floors lighting ring main into the loft .
What i need to know is ,the lighting fuse is rated at 5amp to which i already have 6 x 60 watt bulbs running and 7 x GU10 - 9 watt low voltage spot lamps .I'd like to install possibly 3/4 60 watt bulbs but , i don't want to overload the circuit .
Is there a means of working out how many bulbs i can safely run on my 5amp lighting circuit.
Thanks
What i need to know is ,the lighting fuse is rated at 5amp to which i already have 6 x 60 watt bulbs running and 7 x GU10 - 9 watt low voltage spot lamps .I'd like to install possibly 3/4 60 watt bulbs but , i don't want to overload the circuit .
Is there a means of working out how many bulbs i can safely run on my 5amp lighting circuit.
Thanks
Answers
Best Answer
No best answer has yet been selected by raybush. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.Lighting isn't normally on a ring. Probably no reason it couldn't be.
You're unlikely to overload in a domestic residence but if you wanted to work out the load you need to add up the power if all were on at once, then divide by 230 (volts) to see how many amperes it would take. Roughly. You really need to ensure a margin extra too.
6x60=360, 7x9=56, 4x60=240. 360+56+240=656 (watts). 656÷230=2.85 amperes.
Probably ok, but get someone else to check the sums.
You're unlikely to overload in a domestic residence but if you wanted to work out the load you need to add up the power if all were on at once, then divide by 230 (volts) to see how many amperes it would take. Roughly. You really need to ensure a margin extra too.
6x60=360, 7x9=56, 4x60=240. 360+56+240=656 (watts). 656÷230=2.85 amperes.
Probably ok, but get someone else to check the sums.
TC:
You're somewhat behind the times! The nominal mains voltage in the UK has been 230V, rather than 240V, since 2003. (The Government agreed to change it, in the interests of European harmonisation, in 1993, with the first step in dropping the voltage coming in 1995 and the process finally being completed 8 years later).
The supply is now nominally at 230V but permitted to rise by up to 10% (to 253V) or to fall by no more than 6% (to 216V).
You're somewhat behind the times! The nominal mains voltage in the UK has been 230V, rather than 240V, since 2003. (The Government agreed to change it, in the interests of European harmonisation, in 1993, with the first step in dropping the voltage coming in 1995 and the process finally being completed 8 years later).
The supply is now nominally at 230V but permitted to rise by up to 10% (to 253V) or to fall by no more than 6% (to 216V).
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