Attaching earth to brass banjo?

[CaptainJack88]

I've got to the point where I am earthing inside a plastic housing and I need to earth my Swa gland.

I know I need to crimp the earth and the screw and nut it to the banjo, but can anyone point me in the right direction for a 20S?

I read that you can't just use any metal bolt and lug. The only places near me are screwfix, toolstation and b&q

 

[Iggifer]

http://www.screwfix.com/p/earthing-nut-20mm-pack-of-2/77809

throw away the banjo and locknut, use this instead. Job done

 

[CaptainJack88]

Thanks I was looking at those also.

What size crimp do you suggest for those?

 

[flameport]

I read that you can't just use any metal bolt and lug.

Where, and why not?

 

[CaptainJack88]

Where, and why not?

I can't remember to be honest. Was on a forum, something about having to use brass and not steel

 

[Lectrician]

You are meant to use brass.

The earthing nuts come with screws and crimps.

 

[securespark]

I mount the gland to the box with the banjo trapped between the box and the gland and drill a hole straight through, fitting a brass M4 screw on the outside and a flylead to the E terminal and nut on the inside.

 

[Iggifer]

I mount the gland to the box with the banjo trapped between the box and the gland and drill a hole straight through, fitting a brass M4 screw on the outside and a flylead to the E terminal and nut on the inside.

With an extra locknut presumably on a plastic enclosure (as the OP has)?

 

[Lectrician]

I mount the gland to the box with the banjo trapped between the box and the gland and drill a hole straight through, fitting a brass M4 screw on the outside and a flylead to the E terminal and nut on the inside.

Many banjos have an M8 hole these days, even the 20mm ones. Stupid! You can get M6, M8, M10, M12 brass set screws/nuts from most wholesalers. Many sparks use galv roofing bolts (cable tray etc) for the banjos, but this is heavily frowned upon.

 

[Iggifer]

Many banjos have an M8 hole these days, even the 20mm ones. Stupid! You can get M6, M8, M10, M12 brass set screws/nuts from most wholesalers. Many sparks use galv roofing bolts (cable tray etc) for the banjos, but this is heavily frowned upon.

You must use a better wholesaler than we do!

 

[Lectrician]

You ask, they stock!

 

[securespark]

Lec: The banjo's I remember did not have 8mm holes. In any case, I usually drill through the banjo with a 4mm bit.

What is the "Stupid!" exclamation for?

Igg: Extra nut for strength?

Or you can use these: no locknuts needed: https://www.tlc-direct.co.uk/Produc...SJRCg66Iru54tRPlqhgJqoJLCCwi-jrCVQaAu8y8P8HAQ

 

[Lectrician]

Stupid not aimed at you. At the manufacturer!

 

[Iggifer]

Igg: Extra nut for strength?

Because plastic creeps. If you sandwich the banjo between two locknuts, it's not going anywhere.

Earth nuts/wiska bar clamps are obviously the way forward, but more expensive

 

[securespark]

I have not done a vast quantity of SWA- plastic jointing: every day's a school day as they say.