isolation | Page 8

isolation

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  1. S

    Means of isolation

    Hi Folks, Maybe a schoolboy issue, but, the scenario. I have a 3 phase cct for a car ramp. It's fed by a 4mm swa which comes off an MEM board via 3 pole MCB to a 32A TP&N MEM Fused (HRC) isolator. My question is: Does it need to be locally fused or can it just be a switch?
  2. S

    Control panel - means of isolation - position of isolator

    I'm currently signing off new machinery and the control panel isolator is on the side of the panel. I've always believed the handle should be on the door so the panel needs to be isolated prior to opening the door since the handle interlocks into the body of the isolator when in the 'on'...
  3. Paul.M

    Question #2 Shower Answers

    The previous owner has removed the shower and taken it with them before moving out and has left the 10mm Red+Black t&e sticking out of the wall. Question 1:- What do we do from this point and why? 1:- Basically we need to make sure that this cable is not live and is safe to work on. Lets...
  4. driverman

    Wiring bath room LED's and extractor fans

    Hi, not been wiring for many years, doing a project for family (love job) and would appreciate some advice please , apart from don't do it! Rea;y question is.....how to physically to the job to BS7671 standards. Owner has requested that the En-suites light switches are wall mounted outside of...
  5. M

    Shower isolation outside bathroom

    Hello just been to look at a shower install the consumer unit backs on to the wall that the shower is going on so the easiest option would be to fit an isolator below the consumer unit and drill straight through the wall. Would this be ok to do or will i have to put the isolator outside the...
  6. J

    Local isolation of DB's

    Can anybody tell me off hand that whilst doing a EICR, DB's without a local point of isolation fail? And under what regulation? Is it a C1 C2 C3?
  7. A

    Cooker. supplieed via a switch direct.

    Hi all 6mm Cable runs from Fuseboard into a 45amp DP swith for the cooker. (Cooker load is 7kw) Can the cable run directly from the switch into the cooker or does it have to go from the switch to a cooker connection unit and then a cable from the ccu to the cooker? I cannot see anything in the...
  8. D

    Question regarding isolation.

    I installed a 3 phase distribution panel and i had to prove safe isolation for my NVQ level 3 (working with a qualified electrician) i only had to isolate one circuit. But theres a small sticker saying main switch isolated before removing cover. This wasn't required to isolate for the job in...
  9. D

    Isolation before removing cu cover?

    Im currently taking my nvq lvl 3 and I isolated individual circuit and remove cover and prove unit and circuit which i isolated was dead. but only isolated one circuit. Does the whole installation need to be isolated to remove the cu cover (3 phase 400v), as the other tradesmen was using other...
  10. M

    Requirement of local isolators for 3 phase motors on plant

    Normally I fit local isolators adjacent to 3 phase motors to allow for maintenance. I have been informed that as my main control panel is within 8 meters at most from any one motor on the plant I can install a lockable emergency stop push button to kill the control circuit and use this as a...
  11. J

    16amp b type breaker for oven.

    Hello all, excuse my bad grammar spelling etc. today i had the people from building control around to sign of my cu change at my house,here is my question. My mum had her oven changed a little while ago and it has a design current of around 10.5 amps, the old fuse protecting was a 40 amp wired...
  12. P

    safe isolation Am2

    Hi to do safe isolation on my am2, this monday coming would this be correct procedure, this is a individual circuit, supplying a motor via a rotary switch.Could anyone advise me if this is correct,thanks in advance identify circuit. lock off put key in pocket and display warning sign. check...
  13. E

    safe isolation

    hello I am about to start an electrician apprenticeship and I am researching a bit in general I came across this excellent website and I would like to ask about this algorithm for safe isolation: 1) how do I identify the point of isolation? 2) how do I find the appropriate L1, L2, etc? 3) do...
  14. M

    3 phase isolation

    I am currently on a nc electrical course i am struggling with the 10 steps required to perform a safe isolation can anyone help with any links or suggestions? I get so far E - L1 L2 L3, N - L1 L2 L3, L1 then what?
  15. F

    Testing safety precautions

    Your advice or right answers please no abuse lol if you had to list 5 safety precautions prior to carrying out an eicr what would you put and yes I have done my own list just looking for some answers to compare with
  16. F

    Safe isolation at AM2

    I have my AM2 exam tomorrow and I have a query about where to actually isolate and lock off. On my training day I was shown to lock off the main switch in the board then perform the test sequences with the voltage indicators, put key in pocket after fitting warning notices etc etc. but today I...
  17. B

    shower isolation switch

    Hi, looking for some advice about a shower isolation switch and if I can get rid of it. Its a pull switch which has been on since we bought the place a year ago. Doing the bathroom up now and plastering the ceiling so want rid of it. Could I use terminal blocks in the loft or is there a better...
  18. G

    Fan isolation

    Am I correct in thinking that an industrial type wall extract fan should have local isolation,ie local meaning adjacent to the fan itself,and not via a 13amp plug and socket 12 feet away.Give your views please.
  19. R

    safe isolation for work on lighting

    My manager is telling me that I can safely change a light transformer by switching the lights off at the switch. I thought the light switch wasn't suitable for isolation. And also if the lights are on further on in the circuit can there not be a residual current in the neutral. What are your...
  20. G

    NO water mains

    With regards to main bonding, what is the solution if there is no sign of a water mains? The plummer says the stop cock is outside the property in the street and there is no off valve coming into the house.

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