Safe Isolation.

[Floody]

Can anyone explain the safe Isolation process in steps? Once again, its all going together in my work file for college. We are starting to look at this next Monday and id like to have a bit of a clue in place so im not going blind into the lecture.

Thnks fellas

 

[malcolmsanford]

Surmise you are working on a CU change.

1. Isolate main switch to CU panel and lock 'off"
2. Using a dedicate proving box test your GS38 approved voltage tester for correct operation
3. Remove front cover of CU unit
4. With your pre-tested voltage tester check the voltage LINE to NEUTRAL on load side of switch record result
5. With your pre-tested voltage tester check the voltage LINE to EARTH on load side of switch record result
6. With your pre-tested voltage tester check the voltage EARTH to NEUTRAL on load side of switch record result
7. Carry out sections 4,5, & 6 for supply side of switch
8. Re-check your voltage tester with the same dedicated proving box.

Section 1 & 8 re Proving box, you can replace with proven point of utility, but if your changing a CU then once you turn off the supply the whole installation should be off and there would be no point of utility to test at .

 

[Baker1988]

there is a some thing at college they tell us how to remember it P.I.L.L

P permission to isolate supply / circuit
I isolate the supply or circuit (1-8 of previous pose ^^^^^^^^)
L lock off supply / circuit
L label sayin that electrician at work Ext

 

[trev]

Also on a three phase install (can't get used to calling them lines) you would check all phases to each other as well as to neutral and earth as well as neutral to earth

 

[Sparky Ninja]

This skips the connections to test across, but you get the gist

View attachment 15306

 

[Floody]

Ah brilliant fellas, thats great.
Ill have a better unstading now when we come to it next week.
Got that saved now

 

[Paul.M]

Floody I'm not having a go at you or anyone else but if you feel that someone has given you some good information on your question just give them a "like" or a "thanks". Buttons on the bottom of each post btw.

It shows up on our notifications that someone has given us a "like" and we can see who and where it came from so all the effort we are putting into you guys, we feel some form of reward and may want us to do more for you all...... Have you noticed how the advisers give each other "likes" for good posts? Reason= Forum etiquette... We all work with the electricial industry in one way or another and we all spend time on here for your benefit free of charge, a little "like" will go a long way to reward our input. Thanks.

 

[Floody]

Hi Paul,
It was brought up in another thread also and quite rightly so i 100% agree with you. And as stated before I mainly use the App for this forum to read/post and it doesn't have the thanks button.
I shall be sure to catch up on all my thankings when I get on the pc.

Although in my personal opinion, the effort of someone typing out a thankyou goes along way as opposed to just clicking that 1 lazy button