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Isn't this then a spur off a spur? Is this allowed?

For the sake of electrical neatness, your suggestion will probably be best. I'll put a IP rated double socket on the outside, directly behind the internal socket using 2.5mm T&E. I'll run PVC conduit with 1.5mm - 2.5mm flex to a outdoor lighting switch, at which point I'll go to the SWA. Thanks...

Thanks for your comment - The internal socket is not in an ideal place on the outside wall. - I agree, taking the SWA directly into the socket would be best. But only if additional RCD protection isn't required (nobody has answered this yet).

Thank you for the comments. Riveralt: It was a double socket that only required a single gang backbox that I mentioned, so less disruption required, such as http://www.amazon.co.uk/electronics/dp/B004WGX6FE This (currently) single gange unswitched socket is fed from a switched fused...

Agreed, though I don't think there is anything unsafe from this arrangement -only potentially the unarmoured flex going from the junction box to the outdoor socket. Though this is no more unsafe than any spike type lighting with flex coming from the back. Could you make some practical...

Hi All Working out the best way to get my external lighting circuit connected. I have a single gang socket in the kitchen for the washing machine, under the worktop. This is unswitched at the socket, but instead there is a fused switch elsewhere on the wall. My current thought process is...

Here's what I'm both happy with and going with for the future. I would rather do a as close to faultless job as I can, if anybody ever looks at it in the future. I've used stainless screws on the tabs and tightened them just so the enclosure has a fraction of movement against the wall, to...

Thanks for the comments. Whilst at Alton towers a couple of weeks ago, I noticed that all of the plastic enclosures on rides had banjos on the outside. Some where mounted on rails, which would be subject to vibration... I guess this is just the way it is. I suppose if there is an earth core too...

Changed them to pirahna nuts anyway...

I've been thinking about this - surely this is exactly the same issue as if the banjo was on the outside of the enclosure (compressed directly onto the plastic i.e. the prescribed / normal method)? It would also suffer the additional exterior weathering, ruining some of the continuity.

Spark123: you raise a good point. A potential argument could be that they are dissimilar metals and you'll get a slight corrosion / oxide of the zinc. Two arguments against this could be: 1/ It's inside an IP rated enclosure, so any tarnishing will be minimal. 2/ The armour of the cable is...

Thanks for the comments. It seems the conclusion is, in order of best to worse for normal plastic enclosures: 1/ Earth clamp / bar if both on one side. 2/ Piranha nuts 3/ Banjo between two brass (not galvanized) nuts Not a good idea / discouraged: Using plated parts or dissimilar metals...

Yes, between two (BRASS) nuts would be much better. This is why I am asking, because there is no clear guidance or consensus as to what is acceptable or not. And there are plenty of examples on the web / this forum that I would not be happy with too.... Whether the banjo is soldered first...

Thanks. I agree that solder can weaken over time under certain circumstances. ( see: http://www.ami.ac.uk/courses/topics/0154_fsj/ ). This is a very large surface area of soldered contact, which is in a static installation. Thermal cycling will be a factor but given the size of the joint...

Hi All Wiring a junction box - Is this considered an acceptable method of bonding the earths? Soldered banjo, clipped short and clamped to the inside of the enclosure with the gland nut. Photo attached. Alternatives are: 1/ Piranha / p-nut / lynx nut (expensive on bigger jobs) 2/...