Fido's Getting Shocked!!!

[Simonslimline]

UK Touch voltages <50volts AC. <120volts DC.

Disconnection times below

 

[pennychew]

Cracking post Marvo, appreciate you taking the time to answer my questions.

You rightly point out that a N-E fault probably won't trip an MCB or blow a fuse but would a N-E fault cause Fido to get a shock if the neutral was fully functional?
What is the max permissible N-E voltage allowable by UK regs?

My thinking behind the N-E fault was if the containment was being used as the cpc then would this cause it to become a live conductor?

Stu

 

[pennychew]

i'll send JRCPropery over to fix that fault for fido. might get it done for xmas.

Come on Tel be a Pal, a spark of your obvious pedigree must be able to shed some light on this?

 

[Baker1988]

Cracking post Marvo, appreciate you taking the time to answer my questions.



My thinking behind the N-E fault was if the containment was being used as the cpc then would this cause it to become a live conductor?

Stu

I always thought they wouldn't be a voltage difference between neutral and earth as the earth is connected to the star point of the generator where the neutral also comes from so they should be at zero volts.

A neutral to earth should not give him a shock as the neutral and earth should be at the same potential current will still be in the neutral but there is no potential difference between neutral and earth so nothing should happen.

I have touched a neutral bar (not on purpose) while the circuit was energised and I didn't get so much as a tingle as I was on earth which was 0 volts and the neutral bar was at 0 volts.

 

[Baker1988]

Also I many wrong again but step voltages is the difference in potental between two point which in this case is Fido's front and back legs which because of the difference in potential and the resistance of fido would create a current which could kill him.

I'm sire this happend to a horse a few years back at a race track when a electrician was doing a ir test.

 

[happysteve]

Thanks for setting up this scenario, Marvo, and for your explanation of some things. I haven't had time to do more than read it (didn't see it until yesterday), but when I get a moment I'll ponder it.

Anyway, your time's appreciated.

 

[Marvo]

Thanks Happysteve.

I spoke to Fido this morning and he's in fairly good spirits all things considered but he's getting a bit peckish. He's been avoiding his food bowl like the plague after the bonding incident.

I had a look at the lounge socket as well, it appears the house has been rewired some time ago in PVC singles. They've reused the old steel conduits and steel backboxes for the new all-plastic sockets they've installed. I also saw the socket circuit is a 20A radial circuit with 2.5mm wires. There's no RCD VOELCB's or RCBO's in the CU, just MCB's.

Just to reiterate, the first test we were going to do was to establish what touch-voltage the conduit is at. Any thoughts or ideas on what tester or what method just throw them in the ring and we can discuss some pros and cons.

 

[trev]

FFS man! just dip your hand in your pocket and get this place fixed before someone gets killed.

I'd be happy to give an off plan price but would have to agree board and lodging, safari trip allowances etc

 

[pennychew]

Thanks Happysteve.

I spoke to Fido this morning and he's in fairly good spirits all things considered but he's getting a bit peckish. He's been avoiding his food bowl like the plague after the bonding incident.

I had a look at the lounge socket as well, it appears the house has been rewired some time ago in PVC singles. They've reused the old steel conduits and steel backboxes for the new all-plastic sockets they've installed. I also saw the socket circuit is a 20A radial circuit with 2.5mm wires. There's no RCD VOELCB's or RCBO's in the CU, just MCB's.

Just to reiterate, the first test we were going to do was to establish what touch-voltage the conduit is at. Any thoughts or ideas on what tester or what method just throw them in the ring and we can discuss some pros and cons.

I reckon an analogue volt meter as I keep reading that digital meters can give odd readings with touch voltages

 

[pennychew]

FFS man! just dip your hand in your pocket and get this place fixed before someone gets killed.

I'd be happy to give an off plan price but would have to agree board and lodging, safari trip allowances etc

Can I go as your apprentice? You'll pass my house on the way to the airport!

 

[trev]

Can I go as your apprentice? You'll pass my house on the way to the airport!

Nee botha bonny lad. You got your jabs up to date?

 

[pennychew]

Nee botha bonny lad. You got your jabs up to date?

Are we driving through Sunderland first like?

 

[trev]

Flying over it is just as bad mate.

 

[Marvo]

I reckon an analogue volt meter as I keep reading that digital meters can give odd readings with touch voltages

Good answer...any ideas why you're likely to get different test results depending which one you use?

Also any idea why an analogue tester might give you a more meaningful result?

 

[pennychew]

Good answer...any ideas why you're likely to get different test results depending which one you use?

Also any idea why an analogue tester might give you a more meaningful result?

Ive read an explanation for it a couple of times in threads on the general forum but i cant remember why off the top of my head.