IR
- Thread starter sijaysee
- Start date
Possibly though if this keeps happening at "lots of installations" (as per your original post) then you need to be a little more careful where you're putting 500v. You could end up with expensive repair bills.
I normally measure continuity between line and neutral and test at 250v before letting rip with 500v. Doing the two pre-tests 'should' highlight connected equipment.
I normally measure continuity between line and neutral and test at 250v before letting rip with 500v. Doing the two pre-tests 'should' highlight connected equipment.
Well, bar a fault, the readings you obtained indicated something in circuit.
All I'm saying is be cautious before sending 500v down the circuit. A quick continuity test or 250v IR test would have highlighted the problem without even using 500v and risking damaging potentially sensitive equipment.
All I'm saying is be cautious before sending 500v down the circuit. A quick continuity test or 250v IR test would have highlighted the problem without even using 500v and risking damaging potentially sensitive equipment.
- Joined
- 12 Sep 2007
- Messages
- 72
- Reaction score
- 0
- Country
Hi,
I have found that if you leave the, say, neutral and earth connected to the earth and neutral bars and do not disconnect them that this sometimes can give you low readings, i.e. 50 - 70 Meg. If you disconnect the cables and IR test them individually, therefore treating them as a seperate lines and not taking all lines together then you normally find the resistance shoots up to plus 299 Meg. Could this be what yoru doing?
I have found that if you leave the, say, neutral and earth connected to the earth and neutral bars and do not disconnect them that this sometimes can give you low readings, i.e. 50 - 70 Meg. If you disconnect the cables and IR test them individually, therefore treating them as a seperate lines and not taking all lines together then you normally find the resistance shoots up to plus 299 Meg. Could this be what yoru doing?
Because that's where the load is connected.
FFS.
You cannot do IR tests with any load connected.
You cannot do IR tests if the conductors are still connected at the consumer unit (hello...... Neutral and earth are closely connected, don't you know)
You shouldn't be testing if you do not understand these principles
You cannot do IR tests with any load connected.
You cannot do IR tests if the conductors are still connected at the consumer unit (hello...... Neutral and earth are closely connected, don't you know)
You shouldn't be testing if you do not understand these principles
- Joined
- 11 Jan 2004
- Messages
- 45,897
- Reaction score
- 3,522
- Country
Is that why my 12kW shower works when you connect the cpc to the N terminal instead?
Does Mrs. Secure dry the washing on the shower cable?
DON'T STAND TOO CLOSE TO SECURE'S EARTH ROD!
Or is that a covert security method, jehovas witnesses at the door - flick the shower on
Or is that a covert security method, jehovas witnesses at the door - flick the shower on
They don't like it up them, Mr Mannering!
DIYnot Local
Staff member
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local
