understanding | Page 5

understanding

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  1. A

    Help understanding heating systems

    Hi all, Not long took the plunge and set up as self employed after spending 9 years in the trade. The problem I have is I have never had to deal with heating systems. It is something I want to get my head round because at the moment if I get called out to a heating fault I would be a bit...
  2. C

    understanding the importance of zs

    hi guys just something that's been bugging me, as i understand it a MCB trips on overload (to much current) and a RCD trips on a imbalance of amps through live / neutral , its important to have a low resistance fault path for the protection devices to operate promptly but wouldn't a mcb trip...
  3. R

    Understanding a contactor for lights run by a photocell.

    L and N feed to contactor? Then feed from live to photocell. switchwire back to top of contactor. Then on the bottom have the feed out to the lights??? idiots guide would be appreciated as i have never wired a contactor before. The guy said in spec he wants a seprate circuit for control and...
  4. Katash

    Help understanding my qualification

    Hello, I completed my NVQ 3 Electrical Installation course in 1999/2000 - I received my certificates and immediately changed career .... Few years later I was employed as a factory electrician for 3 years and after that I worked another 3 years in my current job as a multi-skilled engineer...
  5. M

    Understanding shading

    I'm trying to work out how many panels I can get on my south facing roof but I'm a little confused with regards to shading. It looks like the only shading I will get will be from a neighbours roof but only during the depths of winter. Does anyone know how to calculate potential yield of the...
  6. S

    Help needed to understanding testing equipment regulations

    Dear fellow electricians, I am new to the electrical trade and even after several courses am having a very difficult time in understanding what I am allowed/required to buy and what I am not in regards to testing equipment. I am told that to test circuits I need to comply with GS38 although...
  7. J

    understanding tables in OSG and 17th regs book???

    hello just taken my Am2 exams last week and past everything apart from the 30 question online exam. I have booked myself in for a resit of the questions for next friday. questions like... 50mm by 50mm metal trunking fixed horizontally over 20m, how many fixings would it need? that...
  8. C

    Understanding electricians

    Hi there, I have to confess I'm not an electrician... Nor do I know anything about it. But that's why I'm here. I'm doing a bit of research into tradespeople, and wondered if any of you wouldn't mind giving me your two-pennies worth on a few things? Just wondering how you find your work? If...
  9. ringer

    Understanding installation voltages, particularly Vne

    Believe that I am (mostly) up to speed with electricity as applied to appliances (n.b. just realised as I wrote this, that is where the word appliances comes from, never occurred to me before!), so I am now trying to understand installation voltages. My aim is to learn/train eventually to become...
  10. F

    hey all,anybody know best book for understanding formulas

    struggling with getting my head round formulas,anybody know any books which are good or any tips...cheers
  11. M

    Understanding drawings

    Can anyone help me with reading drawings for three phase m/cs or are there any good advice books anyone can recomend. Would appreciate any advice.
  12. M

    help in understanding RCD ratings

    Hi All, I am due to start year 2 of C&G2330 L2 in September and wish to get my head around RCD ratings. I think I have grasped the principle of how they work eg: ensuring the line and neutral currents balance. However, I am not sure about the ratings printed on the units themselves. Looking...
  13. tuckermot

    NAPIT Certification Scheme napit

    HI all I would like to join napit would a consumer unit change and a socket spur:p at the same addresse be ok for my assesment ?? Rich

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