currently has storage heaters unknown rating ? but are supplied from grey twin.earth 6mm wide. surface mounted cable about 20meter run can i run a 3.5kw or 2x 2.5kw storage heaters
storage heaters
- Thread starter KLyouthcentre
- Start date
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Big_Spark
KLyouthcentre said:
If you measured it and it is indeed 6mm wide then the answer is an absolute NO as the cable will be 1.5mm at most.
I would suggest that you get the advice of someone who knows more that you currently do, we would be unable to give any concrete help without knowing the proper cable core size as this is crucial to the current rating of the cable and this in turn is directly linked to the size of heater or any load capable of being supplied by it.
20m of 1.5mm is borderline for 3.5KW is borderline in both cable rating and volt drop but should be ok as long as the cable is away from insulation
using 1.5mm for 5KW is definately out
however i think if it really is only 6mm wide then its probablly only 1.0mm cable in which case both of your proposals are out
using 1.5mm for 5KW is definately out
however i think if it really is only 6mm wide then its probablly only 1.0mm cable in which case both of your proposals are out
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Do you really mean 6mm wide (which sounds like 1mm cable to me too) or 6mm thick? This is all a bit wooly. Have a close look at that cable for any numbers or letters embossed on the outer sheath. If you're really lucky you'll find something that will help identify it.
The cables coming out of your consumer unit can be a useful clue. Lighting circuits are mostly 1mm cable and ring mains are 2.5mm. Does the unknown cable match either of these? If it doesn't then it's most likely 1.5mm or else something bigger than 2.5mm, eg 4mm or 6mm. If it is bigger than ring main cable you can count yourself lucky!
NB: You should know that we are all lazy when talking about cable sizes. You can't measure cross sectional area in millimetres. The correct description of a typical lighting cable is one SQUARE millimetre and that goes for all the other sizes too.
The cables coming out of your consumer unit can be a useful clue. Lighting circuits are mostly 1mm cable and ring mains are 2.5mm. Does the unknown cable match either of these? If it doesn't then it's most likely 1.5mm or else something bigger than 2.5mm, eg 4mm or 6mm. If it is bigger than ring main cable you can count yourself lucky!
NB: You should know that we are all lazy when talking about cable sizes. You can't measure cross sectional area in millimetres. The correct description of a typical lighting cable is one SQUARE millimetre and that goes for all the other sizes too.
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