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minimum

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  1. T

    Yield Loss from low minimum dc input voltage

    Hi All - last post today. Can someone explain yield loss to me? Run a config through sunny design which suggests yield loss. It is suggesting the min volt will not be acheived for the extremety of the cell temp range. When I do standard Voc of array, it exceeds min dc input voltage and start...
  2. P

    Garden Pond minimum distance

    Looked in the regs cant find anything specific on the distance terminations (switches etc) should be located away from the water edge of a garden pond - other than common sense - does anyone know of any guidance on this or specifics for locating terminations for the pond pump and filter...
  3. S

    minimum insulation resistance Mohms

    Hi, I'm studying for my 2391 and tlc website gives the table below. 17th regs book gives 1 MegaOhm for 500v so I take it TLC are basing this on older regs book? Thanks Jon http://www.bathroom-london.co.uk Extra-low voltage circuits supplied from a safety transformer...
  4. B

    mcs minimum light level

    hi , first post is there a minimum light level, watts per meter that MCS require for commissioning the pv system, i have been told that a reading of over 200 watts per meter is necessary for acceptance for commissioning paperwork...
  5. M

    qualifications minimum

    Hi, I have 2391 , and 17 th edition .. do I still need the pat testing qualification . I have over 20 years experience in electronics , and hnc.. am I deemed as competent? And what's the avenge charge per item south Wales Cheers David
  6. N

    Minimum cable size in a henley block?

    Evening all I was wondering if there was a minimum size of cable that can be put into a Henley block. The reason I ask is I have just installed some new electrics out to my garage. I had a couple of spare ways in my house CSU (which has a 30ma RCD) and I have run a 6mm twin & earth out to the...
  7. L

    what is the minimum size wire that can be run to a out side flood light?

    500w flood light, coming out of its spur what is the minimum size cable, round and flat cables. Also, on a seperate question. does an outside flood need a spur ? i have found a lighting cable in my lounge and dont really want an ugly spur sitting on the wall, can i just take it into a...
  8. C

    sockets and sinks

    been racking my brain all day, can some one tell me were in the 17th i will find the minimum distance a socket has to be from a sink, i remember it being 300mm in the 16th, but had it changed? or as the additional protection of and rcd has it stayed the same? a regs reference would be great cheers!!
  9. R

    taking on trainees

    Evening chaps, I have been approached by a young lad with regards to taking him on. he has begun a course at college and on face value seems keen. do any of yoyu know if there is any funding available from any governing bodies etc to help with the costs of wages, training etc. I would like...
  10. S

    Minimum height for overhead cable

    Hi all, bit of a dilemma regarding how to route the supply cable to a garage. Just wondering what you'd do in this situation.. unfortunately I didn't get a photo but the garage is at the end of the drive beside a bungalow. The corner of the garage roof is about 2 feet away from the corner of the...
  11. flukey

    catenary wire minimum height

    i have a shed supply to install on a catenary, and looking in brb it would appear that it needs installing at a minimum of 3 metres above ground it is coming from the corner of a bugalow to the shed and there will be no vehicles coming anywhere near. what heights do you lot normally install at...
  12. D

    minimum cable depths

    Fella's, thanks for the advice,much appreciated, gonna swerve the diggin myself------------looks like the old mans getting wheeled out for this one!!!! Hi all, I am pricing for providing 2 x 16a radial circuits for elec gates, one thing I am a bit stuck on is the acceptable deptch for the...
  13. M

    Minimum charge

    I seem to be coming up against pricing problems.Every phone call starts with how much would it cost? Today one phone call enquiry was to replace 2 lounge pendants in ground floor lounge. I asked if they were of a similar weight and explained if not I would need access through floorboards to...
  14. M

    Minimum Zs 2ohm

    heres a mock exam paper i have with the question : The Measured Fault Impedance of a circuit is 2OHM, the acceptable tabulated Zs. Value of a protective device would be ? can anyone even just point me in the direction of how to find the answer as normaally a can do this with more info ie R1...
  15. A

    Minimum socket heights - first floor!

    Another minimum socket height question! Material change of use - New flat in an old warehouse so I guess you could call it new build. There's no way you'd get a wheelchair or anybody of limited mobility up to the first and second floors, so do the sockets still have to be min 450 and the...
  16. B

    Sockets minimum heights

    My first question (Please be gentle) :D I have a customer looking for a complete re wire no problem there exept they are insistent on the sockets being no more than 300mm from finished floor level. Now I must stress the property is some 30 years old so its not new build ,as far as I am aware I...
  17. brs73

    insulation res testing?

    what methods do people use for testing insulation resistance on lighting circuits,when there are loads of transformers on the circuit?
  18. W

    Minimum Qualifications?

    I am now in the progress of a career path change. I want to know what the absolute minimum qualifications are for unlimited scope part ‘P’ registration with is. As far as I can tell its only 17th Edition. I have worked as an electrical engineer in factory environments for the past 10 years The...
  19. S

    Minimum impedance protection & voltage balance protection

    What are minimum impedance protection & voltage balance protection for Sync. Genarators (turbo/hydro)? Please explain
  20. J

    working out loading of transformers

    please could anyone help me with this simple question.Just wanted to know how i can convert my transformer rating to amps,as i want to know how many low voltage lamps i can put on a circuit.Its only e.l.v halogen lamps.The rating is 20-60va:confused:

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