ChatterBank2 mins ago
How do I calculate the Watts used by some domestic lighting?
2 Answers
I have 4 lights that I use to light a row of bookshelves. They're 10 W halogen lamps, and each has its own big chunky black transformer as a plug. Currently, they're all plugged into a standard 13 amp 4 way extension strip.
I want to re-route the cable run to situate a new bank of switches in a different part of the room. How do I calculate the Amperage tolerance of the extension cable I can use? They're unearthed units (the black transformers) and thus I only need a two core cable, that much is obvious, but I need to work out whether or not I can get away with using 3 amp cable, which of course is preferable because it's the smallest and most discreet.
The black transformers have written on them:
Pri: 230V - 50 Hz
Sec: 12V - 834 mA
which seems pretty obvious to assume means that that's the transform specifics, but is it safe to put 4 of them on a 3 Amp cable?
Many thanks.
Will
Answers
Best Answer
No best answer has yet been selected by Will__. 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.You would need to use the formula P (power) = I (current) x V (volts) measured in Watts
If P =IV then I =P/V.
This would give the current for the circuit and would give you the fuse rating required.
You would have to ensure that you are using the correct units, e.g mA would have to be converted into Amps first,
834mA = 0.834A
Related Questions
Sorry, we can't find any related questions. Try using the search bar at the top of the page to search for some keywords, or choose a topic and submit your own question.