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fluorescent lights 
08-07-2008
| #3 (permalink) |
| Junior Member Join Date: Feb 2008
Posts: 12
 |  Re: fluorescent lights hi, as tielboy states,dependent on switch rating,but you could if neccessary go down the road of using a contactor switched by the two way switch, to handle load,obviously depends on numbers of fittings you want to power up. regards adnarim |
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09-07-2008
| #4 (permalink) | |
| Senior Member  Join Date: Mar 2008 Location: Yorkshire
Posts: 330
| Re: fluorescent lights Quote:
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10-07-2008
| #7 (permalink) |
| Junior Member Join Date: Mar 2008
Posts: 17
| Re: fluorescent lights If I've done my sums right you can have 21 on a grid switch rated at 20A (most grid switches have silver plated contacts so can handle higher currents), which is quite a lot; usually lights will be switched in small groups to make the installation more flexible and save power. |
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10-07-2008
| #8 (permalink) |
| Senior Member Join Date: Jun 2008
Posts: 236
| Re: fluorescent lights How many 4ft x 4 fittings can I put on a two way switch. >>If I've done my sums right you can have 21 on a grid switch rated at 20A << Even if one two-way switch is in Manchester and the other in Nottingham? There are unknowns, some things we know we think we know, the unknowns we know are known. If we were sure of the unknowns then we could be sure we know about the unknowns. Some guy from the US -  ok ok, 400mm strappers...then the 20a switch will suffice -; (the 20a switch/s may be difficult to terminate |
| Last edited by wattsup; 10-07-2008 at 10:41 PM. |
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11-07-2008
| #9 (permalink) | |
| Junior Member Join Date: Mar 2008
Posts: 17
| Re: fluorescent lights Quote:
I thought the original poster may have been looking for a figure rather than a "well it depends", which is why I gave a ballpark figure. Obviously it depends - switch rating, size and length of cable, presence of thermal insulation... Perhaps I should have stipulated "up to 21". | |
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11-07-2008
| #10 (permalink) |
| Senior Member Join Date: Jun 2008
Posts: 236
| Re: fluorescent lights Nope very unlikely, but there are thousands of 100 mtr sheds all over the country, thousands of 50 mtr sheds. It is impossible to say without knowing the exact circuit switching arrangement. Thats all I was saying, you jumped in with 21, ballpark, doesn't work. For all we know this guy is now wiring a 50mtr shed, 21 line fittings on a 20a switch, if he uses 4mm no probs, what if he uses 1.5?. He obviously has no clue by mentioning induction, he is more interested in of how many on a 2-way? Which leads me to believe he is wiring a shed/unit. Of course he can have 200 fittings on a 2-way 5a switch, but not to your criteria |
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