Metal table bonding

[telectrix]

I'm so glad all this bonding is no longer necessary - I used to find the earth bond on my watch strap very constricting.

that's your anti-static band. stops you from frying silcon chips when working on pcb's.

 

[Adam W]

that's your anti-static band. stops you from frying silcon chips when working on pcb's.

Is that why metal tables are bonded? So you can work on PCBs on them without frying silicon chips? Do we no longer do it because it stopped chefs from frying potato chips?

 

[i=p/u]

copper to exspensive for no gain, when money flowing bond it for few hundred

 

[Engineer54]

Unfortunately, the manufacturers of these commercial stainless steel kitchen tables are still providing them with earth bonding points. Most also come complete with sticky notices instructing these earthing points to be bonded. Perhaps someone should point out to these manufacturers that this is no longer an electrical requirement!! lol!!!

 

[telectrix]

metal sinks still have tags on them as well. are these manufacturers the same ones that think a fan will not seize up and catch fire if it has a 3A fuse in the permanent line feed? or are they the ones that design light fittings with terminal blocks that will only accept 1 x 1.0mm T/E?

 

[grantr37]

would PAT test the equipment and change out flex and plugs, find out if you can change zone to RCD protected.....

 

[Farmelectrics]

We were told to earth the metal window frames in the site cabins years ago

 

[Adam W]

If a kitchen that is wired to 15th edition gets a new metal table, will that mean the kitchen needs to be rewired to 17th edition to make it comply with current regs without having to bond the table?

 

[Geoffsd]

If a kitchen that is wired to 15th edition gets a new metal table, will that mean the kitchen needs to be rewired to 17th edition to make it comply with current regs without having to bond the table?

Regardless of the edition in force at the time, as the table is not an extraneous conductive part, any green and yellow would be earthing, not bonding, and therefore should be removed.

 

[markc123]

why stop at bonding a metal table ?
maybe the brass house numbers on the front door need earthng as well ffs.

You know this is coming in a future regs at some point haha

 

[ROADESPARKY]

Rewired a kitchen not so long ago and was told I had to pull a 10mm earth in to bond sink and double drainer. After 30 mins arguing gave up and done just to shut site manager up. Drew the line when he wanted me to bond a stainless shelf!!!!!

 

[Adam W]

Regardless of the edition in force at the time, as the table is not an extraneous conductive part, any green and yellow would be earthing, not bonding, and therefore should be removed.

I see. Are we also supposed to rip out any bonding at the hot water cylinder? How about the main gas and water bonding?

 

[Geoffsd]

No,...

but you are mistaking required and correctly installed bonding for that attached to the table (and spoons?) which is wrongly applied and hazard introducing earthing.

 

[Adam W]

Extraneous conductive part. A conductive part liable to introduce a potential, generally earth potential, and not forming part of the electrical installation.

Would a metal table in a commercial kitchen not fall into this category and therefore have required bonding under previous editions of BS7671?

 

[Geoffsd]

Would a metal table in a commercial kitchen not fall into this category and therefore have required bonding under previous editions of BS7671?

Not unless it was in contact with true earth (the planet).


Metal parts are either extraneous or they are not.

The edition of the regulation does not alter this.