SWA cable termination

[barade]

Can the attachment of the gland and banjo happen at the appliance and not at the consumer unit ?

 

[Guest 004]

In short NO
At the consumer unit is a must.

 

[hillbillie]

Even if you have a dedicated cpc in the armoured cable, you need to ensure the armour itself is earthed, just in case, say, someone sticks a spade through it.

 

[mechelec]

It needs to be correctly glanded at both ends. You can connect earth at one end only.

 

[barade]

do both ends need the gland and banjo ?

 

[SparkyDips]

ideally gland and banjo for earthing armour at supply end. and just gland at the other.

 

[Octopus]

do both ends need the gland and banjo ?

Why would you not fit a gland at each end?

 

[Doomed]

Why would you not fit a gland at each end?

Because some people are not professional.
I wish I had taken pictures of one place I saw recently....

 

[SparkyDips]

maybe its got a plug on the other end?? lol

 

[Octopus]

Because some people are not professional.
I wish I had taken pictures of one place I saw recently....

Yes, I was being sarcastic!

Beats me why questions like this are even asked.

 

[johnboy6083]

You do not need a banjo if the gland is glanded onto bare metal that is effectivley and reliabily connected to the CPC of the equipment. Another alternative is the earthing nuts.

 

[Engineer54]

The use of banjo's or earth nuts and flying leads at one end is an absolute minimum. The use at both ends is standard practice, there are exceptions, but generally that is what i would expect to see on SWA cable installations

 

[johnboy6083]

i would disagree with the banjospart of the above though Eng 54, IMO, if the gland is tightened hard upto say a galv glandplate, then i reall dont see what a bajo will add to that. If the surface is painted/coated, then a banjo is required: either A) tapped to the steel, which is then earthed itself, B) bolted with a flylead attached to the earthing terminal

 

[Engineer54]

i would disagree with the banjospart of the above though Eng 54, IMO, if the gland is tightened hard upto say a galv glandplate, then i reall dont see what a bajo will add to that. If the surface is painted/coated, then a banjo is required: either A) tapped to the steel, which is then earthed itself, B) bolted with a flylead attached to the earthing terminal

Gland plates are exactly one of the reasons to use a banjo or other means of flying earth lead. You cannot rely on the screwed gland plate, to provide suitable ongoing earthing provision...

 

[i=p/u]

plastic boxes and swa

 

[Knobhead]

Just to back up E54, look at a motor gland plate. Would you trust it for your earth continuity? Panel gland plates often have a rubber seal. Always a banjo and flying lead to main earth point of whatever bit of kit it happens to be.

A way we used under M&Q was to use two banjos per gland and link them as shown.

View attachment 11219

 

[ian.settle1]

Yes, I was being sarcastic!

Beats me why questions like this are even asked.

Basically it's because they don't know what their doing after saying they can do the job or is that me being a tadge perdantic.

 

[johnboy6083]

You do not need a banjo if the gland is glanded onto bare metal that is effectivley and reliabily connected to the CPC of the equipment. Another alternative is the earthing nuts.

i did mention thats it needs to be reliably and effectivley connected to the earthing terminal of the equipment. On panels that i use, there is almost always an earthing stud, to which a flylead is taken off to the earthing terminal, or chassis of the panel.
to just do away with the banjo, and hope for the best is exactly the opposite of what im saying, what i am saying is that banjos can be ommited, if the gland is tightened onto bare metal, which is then linked reliably and effectivley to earth.

On small CUs and DB's i almost always use banjos because the glandplate cannot be relied on, even when paint is removed.