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B

beaver74

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can any one give me some advice about motorized gates is there an average current rating
as i have been asked to supply a motorized gate that no one has seen or even chosen and chances are there will be drive way lighting. at the moment i am calculating 20A over 600m which works out at 50.00mm 3core swa but if loading no were near this a smaller cable can be used
assuming most gates are screw type wich are efficiant.
also as load not constant i would say 35.00mm will work as no heat will build up for 2 or 3 mins it will be in use
 
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S

Spudnik

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  • #2
Surely the best thing to do is tell the client that you are unable to work out the circuit design until you have a firm spec on the gate?

It sounds to me that there are too many variables to guess at this stage.
 
B

bahco

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  • #3
ive only ever fitted one electric gate and it was a few years ago, im sure it was around 700 watts.
 
S

Spudnik

  • Thread Starter Thread Starter
  • #4
Maybe best to have a rummage around the net at some suppliers websites and see what general ratings are.

At least that would give you an idea until you get the spec from the client.
 
can any one give me some advice about motorized gates is there an average current rating
as i have been asked to supply a motorized gate that no one has seen or even chosen and chances are there will be drive way lighting. at the moment i am calculating 20A over 600m which works out at 50.00mm 3core swa but if loading no were near this a smaller cable can be used
assuming most gates are screw type wich are efficiant.
also as load not constant i would say 35.00mm will work as no heat will build up for 2 or 3 mins it will be in use
I haven't done the calculations but just looking at your results,it looks like massive overkill.but I'm guessing this was done on a software program,and maybe ambient temperature could be adjusted to help bring down volage drop? Gates I've worked on were low voltage,with a battery back up,but I think only a 5amp supply was needed.I don't suppose the gate is near an electric pole? and you could maybe get a new meter/supply put in.
you could also make it TT and then you could use 2core(a lot cheaper on a 600meter run)
 
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