poles

poles

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  1. R

    Is a 2 pole breaker the same as a breaker that has twin single poles?

    I am searching for an RV 30/20 amp 2 pole breaker. (Cutler-Hammer BD3020 A3020 Types BRD, & A 120/240V Cu/Ai HACR Type 2 pole unit J-969 E7819 - T LR43556 Disj) I see quite a few breakers with these specs.....except they are 1 pole. I have seen breakers that are twin single pole breakers and...
  2. T

    Cable Poles / Fixing

    Looking for some help / advice on how best to route some SWA cable over a track. I’m running SWA to some land at the rear of our property however I have a single track to go over. Burial is not an option and others have erected timber posts to send the cable up and over. I was going to use...
  3. spud1

    Why are the two poles of the Hager SPD rated differently

    So I was installing a new split load Hager DB (with the integral SPD) and noticed that the SPD cartridges connected across the neutral and line poles of the SPD were rated differently. Is there a reason for these different ratings? Spud
  4. gazdkw82

    3-phase motor RPM=fx60/p

    just going through some mock exams to prepare me for the 202 exam I have next week. Came across the following question A 3-phase synchronous motor is required to operate on a 50Hz supply and run at 500 rpm. The number of poles required is: So I know the formula for this as RPM = Fx60/poles...
  5. J

    rotary switch wiring

    Hi guys Got a swa run to do tomorrow- just the supply for a AC unit its a single phase 3 core 4mm supply going to a rotary isolator (this is what I am installing) then another company will be connecting a AC unit from the isolator at a later date I haven't actually had to install a rotary...
  6. W

    Conduit support in marquee

    Have a job to fit 9 fluorescent fittings in a very large marquee made up with large aluminium poles . I want to run the circuit in conduit , can anybody tell me if there is anything out there I can use to secure the conduit to the aluminium poles making up the roof of the marquee . I have found...
  7. C

    Overhead poles

    Perhaps slightly OT but I don't know where to ask... Does anyone know what the maximium power is that can be run on overhead poles in the UK? eg How much power can the DNO run on poles before needing pylons or underground? For example could a 6MW wind farm be connected to the grid using poles...
  8. N

    Is a main double pole switch a linked switch?

    Hi I am trying to fill in the Condition Report Inspection Schedule For Domestic and Similar Premises With Up To 100 A Supply. For a single phase installation. The part that I am enquiring is in Section 4.0 Consumer Unit/ Distribution Board, part 4.7 that states " Presence of main linked switch"...
  9. T

    what are these for on electric poles??

    Hi - what does this grey box do its on a electric pole nr my house and has recently been damaged?, is it a danger at all?,
  10. D

    High Level PIR floods

    Got a security install to do and they want the flood lights mounted high level on poles. Can anyone tell me where I can source poles and the appropriate fixings from? Or am I just looking at getting down the scaffold yard.... Advice would be great, ta.
  11. G

    Use of Pyro in a boat yard. Existing installation

    In a small boat yard, two lighting poles are fed with two core pyro the outer sheath being pvc covered and buried in concrete. Both poles are connected in parallel with each other. A single metal clad waterproof switch controls both poles. The feed to the 1st pole has gone down but the pyro to...
  12. C

    Switching poles

    Hi cud u help, I was just wondering when you have for instance a 3phase isoltor it's classed as a 3pole sw am I right as in it sw's the 3 phases but why do u not sw the N therefore it being a 4 pole sw and y do we not sw the N and in other isolators we do sw the N
  13. C

    Em Lighting key switches!

    OK, Settle this once and for all please chaps. When keying off emergency lights, should you switch; 1) just one pole (e.g. the permanent live) 2) two poles ( e.g. both switched and permanent lives) or 3) three poles ( both lives and neutral also (as some key switches...
  14. A

    Pylons and Poles (The wooden ones)

    Just a general query about electricity pylons, and the poles that carry supplies down country roads etc. Can anyone give me a general summary of what each cable is for? For example, some wooden poles carry only two cables (horizontally), while others have four cables vertically arranged. Are...

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