Gland banjo fitting

[nickblake]

I couldn't use the Orbix self tappers for fixing the Banjo, I like all my banjos on the inside of the CU can't stand seeing them on the outside so if I popped in an Orbix it would look slightly ridiculous sticking out of the CU

agreed if they are on the inside then fair comment , on some occasions especially with a small CU its not always easy on the inside , they do have nice yellow covers though lol

 

[pennywise]

agreed if they are on the inside then fair comment , on some occasions especially with a small CU its not always easy on the inside , they do have nice yellow covers though lol

Sorry mate wasn't trying to poo poo your method, just how I like doing them. Agreed in small CU's it can be a sodding nightmare . The little yellow nipples are quite fun

 

[nickblake]

Never thought you were mate , i do fit them inside on larger boards but got into the habit of doing it that way as i do alot of smaller boards like 2 and 4 ways , little yellow nipples as you call the work great in straws ... if you understand what im saying lol

 

[millsy82]

hi you cannot use self drilling screws into any enclosure or part of an installation eg metal trunking ,cu. They must be machine threaded.the method i was taught and used for last 12 years, 6mm nut and bolt not roofing bolts and lugged earth lead to appropriate earth terminal.NIC EIC inspector instructed me a few years ago if swa glanded connection is into a plastic enclosure you must space banjo on the inside with additional locknut giving a space bettwen banjo and plastic surface to reduce chance of heat in fault conditions. if i agree or not is a different matter.

 

[johnboy6083]

if only bolting banjos to glandplate, then IMO, you must scrape the paint away on the glandplate. you must then link the glandplate to the earth bar, again scraping paint away. Another alternative is to use serrated washers that bite into the metal. If not wanting to scrape the paint, then you must link the banjos to the earth bar. this can be done with brass nuts and bolts, or steel, and either with the banjo flat against the glandplate, or bent up.
remaber that the installation may pass testing when its brand new, bit add years of neglet and rust/corrosion, and its a different matter.

Its for this reason i try and avoid using the armopur per se.

 

[pennywise]

Nice one

Do the Pirahna nuts just screw onto the gland inside the encloser then?

sorry mate didn't see the question, the piranha nut replaces the lock nut of the gland kit one side of the nut has blades to bite into the steel enclosure.

Piranhna Earth Nuts - Pirahna

 

[millsy82]

The contact area between banjo and earth lug is sufficient if not you would not have low enough earth reading.surely scrapping paint away from cu would only speed up rust/corrosion at that point.

 

[johnboy6083]

im talking about the instance where sparks only bolt the Banjo to the glandplate, and not attach a flylead, ie ther rely on the banjo conducting through the glandplate itself.

as for corrosion, you are supposed to paint/spray the area after banjo is bolted securley, and gland is tighteneed onto glandplate. i beleive that there is a gel you can buy, its also used on connectuions from copper tinned lugs to stainless.

 

[millsy82]

The question is would a spark only bolt the banjo and not use a flying lead.but seen it done put it down to lazyness.even when using 3 core armour for earth i still gland earth flying lead at cu.
sorry for mis interpreting your post

 

[Deleted member 26818]

Not actually used these Piranhna nuts myself, just use what I'm given.
Using these, is it possible to do away with the banjo/frying pan and connect the fly lead to the nut?
The web site appears to indicate such, as they claim there is no extra drilling, but it's not 100% clear.

 

[johnboy6083]

well im the same as you, and always link it to the bar with min of 4mm. i always try and avoid using armour as CPC anyway, but i have done in the past, and will probably do it again at some point.

yes, you can just bolt the flylead to the pyranha nut.

 

[pennywise]

the nut allows you to do away with the Banjo, you have a grub screw to lock the nut to the SWA thread then you attach you fly lead to one of the spare threaded holes around the perimeter of the nut.

John you beat me too it

This a better link for illustrative purposes

http://www.s-w-a.co.uk/page5/page76/assets/BELN.PDF

 

[millsy82]

piranha nuts basicaly replace locknut and there is a connection from this to take a earth to cu terminal they are ideal for use on remidial works on P.I.R'S if no banjo was origianally fitted disconect circuit and replace locknut no need to remove swa from cu to fit banjo then drill and bolt then fly lead
earth.

 

[DaveyD]

http://www.s-w-a.co.uk/page5/page76/assets/BELN.PDF

Loving the neatness of the fly leads. Are they pre-formed do you think P.W. ? Or am I a crimping dunce?

 

[pennywise]

They look like they are done with a hydraulic crimper mate with hexagonal dies