tray bonding

[johnboy6083]

If they are supplied with the gear, then I'll fit em, however none of the gear I'm supplied with comes with earth straps. In fact, as far as I'm aware, only ladder rack joiners come with earth straps as standard.

all of the tray and trunking we use comes with steel joiners, and I fit them, and always ensure they are tight.

regarding specifications, a lot of company specs are over engineered. Our spec calls for all electrical equipment to have voltage labels, which is above and beyond BS7671 (unless over 230v to earth, which 99% of LV installations are not).
we also have to link from the banjo of the load end of a cable to the nearest metalwork.
this is also above and beyond BS7671.

just because you see it in specs, it doesn't mean they we have to follow the same rules, when you can prove that the alternative is just as safe, and more economical.

 

[Engineer54]

just because you see it in specs, it doesn't mean they we have to follow the same rules, when you can prove that the alternative is just as safe, and more economical.

You can do whatever you wish to do, and i'm sure you will, but if a specification calls for them, (or working on a project of mine) they Will go in... lol!!

 

[johnboy6083]

That's fair enough, and if working on your jobs, I would do as I'm told.

 

[cobrauk]

I agree its a waste of time using straps unless you make a bad job of connecting, and powder coated was the only time i have seen links supplied with trunking you have to buy them as a extra nowadays, also if you look the 90 and T bends only have one or two holes to connect between the trunking and the bend most don't have couplers between a bend and the trunking and its self so that means you would have to drill a second hole to install & connect a link yes ?

 

[Knobhead]

You can do whatever you wish to do, and i'm sure you will, but if a specification calls for them, (or working on a project of mine) they Will go in... lol!!

And here was me thinking you weren't one to follow dogma.
Sorry E54 but we’ll have to agree not to agree on that one.

I will add it would be a rare occasion where I would be mounting trunking or tray against a brick wall. When we did our normal practice would be construct a welded frame in the workshop with everything drilled to suit before hand.

 

[Engineer54]

And here was me thinking you weren't one to follow dogma.
Sorry E54 but we’ll have to agree not to agree on that one.

I will add it would be a rare occasion where I would be mounting trunking or tray against a brick wall. When we did our normal practice would be construct a welded frame in the workshop with everything drilled to suit before hand.

Depends on the dogma!! lol!!

As i have always worked primarily on highly spec'd projects, it's almost second nature to me to use copper straps across tray and trunking installations. Same goes with flexible earthing straps across isolating flexible joints on A/C ducting.

 

[Knobhead]

Depends on the dogma!! lol!!

As i have always worked primarily on highly spec'd projects, it's almost second nature to me to use copper straps across tray and trunking installations. Same goes with flexible earthing straps across isolating flexible joints on A/C ducting.

I'll not disagree with bonding flexible joints. Ducting depends on its construction.

The companies I've worked for were all blue chip so money hasn't really been an issue, just what's required.