Ze

[Buzz-light-bulb]

How many electricians out there disconnect main earthing conductor to get Ze.

 

[Steve Mann]

Well I alway do

 

[coxyboy]

Yes I do

 

[Octopus]

Why do you ask?

 

[Darkwood]

All of them should or their competence comes into question you are looking for the Ze value with any parallel paths eliminated where possible to give an accurate result.

 

[Buzz-light-bulb]

I always do, I've come across a lot of sparks lately that doesn't do it, you try to explain but it goes through one ear out the other

 

[Darkwood]

They are not Electricians then just glorified cowboys their scheme provider would pull them on it if they did it on their inspection date.... you have to separate the earth best by disconnection from Met so as it limit any possible parallel paths ive seen people just drop the bonding out but they leave main earth on not realising that the boiler supply is connected to both Gas and Water through earth and gives back the paths they though they had disconnected, obviously not the case if incoming services not in plastic...... the issue here isn't about domestic as it should always be done its when you come to large commercial and industrial where for obvious reason you will be required to shut full power down for the Earth removal to be done safely - this isn't always possible without weeks/months of planning as not every business out there is as flexible as the other to do so, this is where shortcuts do get made.

 

[Stuuk1]

They are not Electricians then just glorified cowboys their scheme provider would pull them on it if they did it on their inspection date.... you have to separate the earth best by disconnection from Met so as it limit any possible parallel paths ive seen people just drop the bonding out but they leave main earth on not realising that the boiler supply is connected to both Gas and Water through earth and gives back the paths they though they had disconnected, obviously not the case if incoming services not in plastic...... the issue here isn't about domestic as it should always be done its when you come to large commercial and industrial where for obvious reason you will be required to shut full power down for the Earth removal to be done safely - this isn't always possible without weeks/months of planning as not every business out there is as flexible as the other to do so, this is where shortcuts do get made.

I never do.

We cannot turn anything off in Telephone Exchanges...

 

[Darkwood]

I never do.

We cannot turn anything off in Telephone Exchanges...

Was for the OPs benefit and yes ive expressed its not always possible but im thinking asking the question in the first place my answer is tailored for the OP and domestic.

 

[Des 56]

I always do, I've come across a lot of sparks lately that doesn't do it, you try to explain but it goes through one ear out the other

Perhaps they determine Ze by enquiry :smile5:

 

[Guitarist]

Perhaps they determine Ze by enquiry :smile5:

Conversation goes something like this...

Electrician : Could you give me the Ze figure for 64 zoo lane please?

Supplier : What's a Ze? Is it a kind of animal?

 

[Farmelectrics]

Well it's always best to but if you don't your not getting a ze it's classed as zdb when the earth is still connected

 

[Guitarist]

Well it's always best to but if you don't your not getting a ze it's classed as zdb when the earth is still connected

I would class it more as an inaccurate Ze. A Zdb implies a sub-board.

 

[Darkwood]

Well it's always best to but if you don't your not getting a ze it's classed as zdb when the earth is still connected

Thats it couldn't remember the short-form and is used where you can't do it due to the nature of the install ...only ever done it once and was a hospital .... apparently they get upset when you power down :46: i only went for a cracked rib as well - i was bored :wink5:

 

[Des 56]

Conversation goes something like this...

Electrician : Could you give me the Ze figure for 64 zoo lane please?

Supplier : What's a Ze? Is it a kind of animal?

Never mind getting a value
If we were to ask whats the earthing system, the telephone voice could well suggest asking Jodrell bank