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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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lv transformer question
Hi,
I have a transformer that runs two 10w G4 light fittings. The transformer has a small 5-way connector block built into it. It has 20W written on the side. It looks much like the following one which claims to be an 105w model: http://www.toolstation.com/shop/Ligh.../sd2638/p39954 My possibly stupid question is, is my transformer likely to be rated at 20w in total or 20w per output, i.e. 100w intotal? Now given that there are 5 possible connections that can be made to it it would seem unlikely that it is expected to power 5 lamps at 4w... or am i being too hopeful? The reason that i am asking is that I would like to uprate the G4 bulbs to 20w each. Thanks |
#2
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lv transformer question
In article ,
GMC wrote: Hi, I have a transformer that runs two 10w G4 light fittings. The transformer has a small 5-way connector block built into it. It has 20W written on the side. It looks much like the following one which claims to be an 105w model: http://www.toolstation.com/shop/Ligh.../sd2638/p39954 My possibly stupid question is, is my transformer likely to be rated at 20w in total or 20w per output, i.e. 100w intotal? Now given that there are 5 possible connections that can be made to it it would seem unlikely that it is expected to power 5 lamps at 4w... or am i being too hopeful? The reason that i am asking is that I would like to uprate the G4 bulbs to 20w each. The *total* max load should be marked on it somewhere. Because it is externally the same as another doesn't mean much. So if it says 20w that is the maximum. -- *Why are a wise man and a wise guy opposites? Dave Plowman London SW To e-mail, change noise into sound. |
#3
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lv transformer question
snip
The *total* max load should be marked on it somewhere. Because it is externally the same as another doesn't mean much. So if it says 20w that is the maximum. Hmm, the only rating in watts on the transformer is 20w. I just find it hard to imagine that a 5 way transformer would be rated so poorly, I mean do 4w bulbs even exist??? Cheers |
#4
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lv transformer question
"GMC" wrote in message ... Hi, I have a transformer that runs two 10w G4 light fittings. The transformer has a small 5-way connector block built into it. It has 20W written on the side. It looks much like the following one which claims to be an 105w model: http://www.toolstation.com/shop/Ligh.../sd2638/p39954 My possibly stupid question is, is my transformer likely to be rated at 20w in total or 20w per output, i.e. 100w intotal? Now given that there are 5 possible connections that can be made to it it would seem unlikely that it is expected to power 5 lamps at 4w... or am i being too hopeful? The reason that i am asking is that I would like to uprate the G4 bulbs to 20w each. Thanks The item in you Toolstation link looks like a switching type power supply. Thermal overload and short circuit protected are a bit of a give-away. I guess they are called "transformers" for historical reasons. If yours is also of the switched type, it's obviously older and may well be the same size for a much reduced output. |
#5
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lv transformer question
On 3 Dec, 11:22, GMC wrote:
snip The *total* max load should be marked on it somewhere. Because it is externally the same as another doesn't mean much. So if it says 20w that is the maximum. Hmm, the only rating in watts on the transformer is 20w. I just find it hard to imagine that a 5 way transformer would be rated so poorly, I mean do 4w bulbs even exist??? I have several different LED transformers which have different power ratings, but are all housed in identical boxes, with identical connectors, probably because it isn't worth the hassle of manufacturing slightly different boxes for each variant. The 5 connectors are probably only be there to allow higher rated models to make use of them. dan. |
#6
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lv transformer question
dent wrote:
On 3 Dec, 11:22, GMC wrote: snip The *total* max load should be marked on it somewhere. Because it is externally the same as another doesn't mean much. So if it says 20w that is the maximum. Hmm, the only rating in watts on the transformer is 20w. I just find it hard to imagine that a 5 way transformer would be rated so poorly, I mean do 4w bulbs even exist??? I have several different LED transformers which have different power ratings, but are all housed in identical boxes, with identical connectors, probably because it isn't worth the hassle of manufacturing slightly different boxes for each variant. The 5 connectors are probably only be there to allow higher rated models to make use of them. dan. ok, so it is realistic that it is indeed a 20w TOTAL that the transformer is capable of! I will buy an uprated model to suit my requirement. Thanks for all of the answers. |
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