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Yeah the control cable is quite a but smaller. As an example I am working on at the moment. Compressor unit is rated at 25A max. Internal evaporator is 0.15A so you can see my predicament, complete waste of money running the lot in 4mm. I think I will stick with a breaker and run the control...

Hello all, I work mainly in the Air Con industry, the general wiring make up of an AC installation is, DB to External Compressor then Compressor to Internal Evaporator using a control cable. Since working in this industry I have always been concerned with the control cable. The current draw of...

Did mine on a 10 week evening class at the local Tech. I known some places offer 3 day courses but unless your s-hot at testing and know the regs inside out then dont bother. The practicals hard enough and the writtend test is at least 2 or 3 times more difficult than the 2382 and you dont get...

Thanks, I have just thrown it against the wall and now its open :twisted:

its a Bals CEE Norm and its going out the window in about 5 mins, Thanks for any advice 123

How the bloddy hell do you open a Quck Connect Commando Plug?

As a general recommendation accessories should be mounted above sink height at a horizontal distance of not less than 300mm from the edge of the sink top.

Cheers, thought as much. Probably megga bucks

If I wanted 3 phase put in a house whats the likely bill from the DNO. Reason being a customer wants his entire house fitted with AC, best method is to use a VRF system but there all 3 phase.

Thanks gents, The gap is about 6" I couldnt get the metal box any closer, other cables in the way. I have opted for flexible conduit into female adaptors as its not perfectly straight, Im going to strip the lot back and run it in singles.

SWA cable consists of: a) Outer sheath b) Steel wire armour c) Inner insulation over conductors d) Actual conductors. I have glanded to an adaptable metal box and want to run the cable from there to CU. There is however a short gap between metal adaptable box and CU. Can I simply take the...

Im probably going to burn in hell for this one but here goes. Equipement is designed to run at 230v right, however we all know that the actual measurement from the mains is 240 and usually above. So if the V.D calculation is boarder line shoud we be overly worried as the voltage wont drop too...

I know I know Iknow :lol: its Bout 7V so it would have been fine. I had just enough 2.5 SWA from a previous job so I used that From D.B to Compressor. That part of the the install needed mechanical protection. From Compressor to Fan I have used 1.5mm 3 core and earth (no need for...

This is what Im working on I think you will get the point I am trying to verify Compressor is rated 7A (Max) running current 3A Fan is rated at 1A. toatal load is 8A but more loke 4A when running 2.5mm cable from DB to Compressor 1.5mm cable from Compressor to Fan D.B is fitted...

Tim thanks for your response Every AC job I have seen always has a derated cable from Compressor to Fan (without fusing). this is obviously a No No but I was under the impression that so long as the main fuse is suitable for both cable types than that is fine. I think the best way to fuse...

Tim you have lost me a tad on your last post. Your saying that if not separately fused then the same cable must be used in the entire length of the cable run. I cant see how you would need a separate fuse if the fuse back at the D.B is sufficient to protect the derated cable from...

Space Cat. Ok so from Compressor to fan calculate the V.D in that length only and add whatever is dropped to the V.D from D.B to compressor. If the total does not go over the 4% allowed i.e. 9.2V then were ok. Right

Thanks one and all :wink: . I will do the following: 1) Calculate V.D at the compressor using the combined Compressor and Fan current. Use cable to suit from D.B to compresssor as per the outcome of that calculation. 2) Calculate the V.D from Compressor to Fan but using the entire cable...

I have a question regarding the calculation of V.D for Air con units. The supply to an AC unit is generally connected from DB to external compressor unit. The internal (fan) evaporator is then connected from the external compressor unit via a 3 core and earth cable. Its easy enough to...

Been doing some work in a clients premises, working above a suspended ceiling. I need to replace 1 section of ceiling grid as when removing the ceiling we some how have managed to lose a section of the grid :oops: Can I buy replacement grid off the shelf? can anyone tell me where. Thanks