Mcb

[Chota_maal]

Hi all,

A quick question hopefully ! Will an MCB open if the Live wire touches a metal case and there is no earth cable. 

Thanks

 

[Andy™]

unlikely, but you may end up dead if you touch it...

 

[Chota_maal]

Hi all

Will an MCB operate without a earth being in a cable, if Live touches a metal box.

Thanks in advance. 

 

[phil d]

An mcb operates when a current flows which exceeds the rated value of the breaker, assuming the box is earthed, and the loop value is low enough then yes it would trip, however I would expect the rcd to drop out first.

 

[Kurt]

maybe, or maybe not

 

[phil d]

You've just asked a similar question in another section, as Andy has said it's unlikely, however as I said in the answer to your other post, if the box is earthed and loop value is low enough then it should, however as I also said the rcd should drop out first, what are you playing with?

 

[Andy™]

why post another thread asking the same thing after you already have answers in your first one?

 

[Andy™]

what are you playing with?

something he doesnt know enough about?

 

[phil d]

something he doesnt know enough about?

Aw, come on Andy, maybe the guy's making an electric chair to get rid of the mother in law and want's to make sure the breaker won't trip.

 

[phil d]

why post another thread asking the same thing after you already have answers in your first one?

It's obvious, he posted the first question a while ago, didn't like the answer you gave him so thought he'd try again, thing is he still got a similar answer, guess it's just not his day. lol

 

[Andy™]

fair enough. in that case i recommend a stuffing the outgoing cable into the same side of the MCB as the busbar

 

[phil d]

fair enough. in that case i recommend a stuffing the outgoing cable into the same side of the MCB as the busbar

Ahh, but wouldn't that make it dangerous, a potential fire hazard.lol

 

[Andy™]

the fire may help dispose of the electrocuted body

 

[sprocketflup]

I had to do an EICR on a prison once, ended up condemning the room with the electric chair in it, damn thing was a death trap.

 

[sprocketflup]

Sometimes I get this overwhelming sense of deja vu........its not the first time either

 

[Evans Electric]

Sometimes I get this overwhelming sense of deja vu........its not the first time either

You certainly do  Sprock...I did that joke  years ago . :innocent

 

[Lurch]

I did that joke  years ago

You did everything years ago!

 

[phil d]

You did everything years ago!

I think we all did,who'd have thought that lying on damp grass would cause so many people to have bad backs and knees? I'm surprised the government haven't banned it lol

 

[Evans Electric]

You did everything years ago!

Unfortunately you're right Lurch ......some things I'm still doing .