SWA cables and banjos!

[ewatty]

Hi all, quick question on people's thoughts....

Someones installed a swa for a lift/ramp in a garage but not used any banjos either end.

its a 5 core cable (brown black gray g+y blue) it's glanded to a metal db on end, and a plastic isolator the other, now should it have banjos and fly leads both ends or just the plastic end or not at all as the sheath is connected via the gland at the metal db? Also as its 3-phase should it be phased marked as in brown marking on each live wire? Or just left brown black gray?

bit of a gray area in my head...

Any help? Cheers

 

[nickblake]

easiest option would be to install an earthing nut on it job done

 

[Aindowsimon]

Wot I like doing if I have a metallic db is i allways if possible have peace of trunking above dis board gland and banjo all swa's to the trunking ( no earth tail to each banjo in the instance below if I were to gland swa's to a db solely probably would earth tail each ) and usually earth the trunking via the banjo of the supply swa . I always remove paint as tidy as possible at db side when glanded directly .



I trust the trunking to to supply a reliable sound interconnection of earth between glands but yes have a earth tail to trunking usaly same csa as MEC .

This last pic is a mystery had uploaded it as a mistake and deleted it but its still there ????? No relevance

 

[Darkwood]

I see a need for a quick of galv' spray paint may be i order to cover any revealed steel judging by the damp on them walls

 

[Aindowsimon]

Just been roofed . Ye damp wall's why arnt I allowed to remove the photo ?

 

[Darkwood]

Talk to admin .... ive noticed the same thing too when i want to take a photo down it wont let me ...

 

[44ALLAN]

"But having said that I will agree that after reading that i would need to start fitting banjo's or earth nuts in the future".

Yup.

At both ends mate with a 6mm brass nut and bolt either tapped or drilled through the banjo and box(paint removed with file and contact grease applied of course lol).

You then take a fly lead from the 6mm bolt and armouring to the internal earthing terminal of the board...........sized accordingly.
You then have your internal earth as your cpc and your swa as a cpc(if required) and they can then both be a bond and vice versa.............complimenting each other as it were
Then you have the parallel paths and disconnection times in a nano second.......................................................

Or you can just use the Swa as your cpc of course

 

[tannerselectric]

Surely you should know how to do this, if you are a qualified electrician

 

[nickblake]

had to replace an isolator in a wash up area of a hot it had a TPN switch right next to a dishwasher water every where the armour was the CPC , I replaced the isolator with a rotary IP rated switch used the earthing nut tightened the grub crew earth tail to earth block and tadarr job done spot on continuity readings and Zs happy days

 

[SirKit Breaker]

Un earthed SWA armouring to the main earthing terminal in the plastic DB is a non conformance on the inspection assessment for the inspection and test course, if you dont pick it up you will fail, so read into that what you will.

Cheers..........Howard

 

[ewatty]

So bottom line is its best to be earth tagged at least one end if not both!

 

[telectrix]

if non-metallic boxes, tag at one end if you just want to earth it. tag both ends if it's being used as cpc.

 

[44ALLAN]

had to replace an isolator in a wash up area of a hot it had a TPN switch right next to a dishwasher water every where the armour was the CPC , I replaced the isolator with a rotary IP rated switch used the earthing nut tightened the grub crew earth tail to earth block and tadarr job done spot on continuity readings and Zs happy days

So what your saying is the IP rating wasn't correct from the initial install but it is now
Shrouds and outside IP rated glands to IP56(ships deck) if there was water everywhere? :thinking2:

 

[44ALLAN]

So bottom line is its best to be earth tagged at least one end if not both!

depends what you mean by tagged? earthed? or bonded?


Why would it need any from one end or both ends?

 

[ewatty]

:juggle2:

 

[44ALLAN]

:juggle2:

thought so lol