Corroded swa gland - garage CU

[Leyland30]

Thanks all, marvo I'm also convinced the moisture is eminating from the gland entry point. As you say, the rust is only present by that particular gland. However, the CU is well over a metre from ground level!?

In regards the CU construction material, BG website isn't particularly helpful but a magnet isnt attracted so, as Richard suggests; likely to be Al or alloy.

When I get chance I'll strip it down and provide an update.

 

[westward10]

Three protective devices with only one compatible with the enclosure.

 

[davesparks]

What a lash up of an installation!

It looks like there is a bit of corrosion around the other two glands at the bottom, and if it is non-ferrous then I'd guess that there's a quantity of aluminium in the alloy which has led to galvanic corrosion.

 

[Richard Burns]

The absence of earthing conductors to the other SWA glands would perhaps indicate that any voltage on the armour of those SWAs would cause a current through the shell of the CU and this would be directed to the incoming supply gland and would be consistent with the levels of corrosion in that the maximum current would be at the incoming earth and lesser current at the circuits passing through the CU.

 

[freddo]

Is the incoming earth actually connected to the earth bar?

 

[Pete999]

Poor termination method, was the paint cleaned from the CU prior to Glanding, all very well using Piranha washers, preparation is everything, pity they don't teach that on the courses, isn't it?

 

[westward10]

See what happens when you post a pic, just as well none of us are critical.

 

[Leyland30]

I envisaged some critique hence why I saved posting pictures of the CU until I got some concensus on the gland.

As long as it's constructive.

You've not seen the house CU yet! (Head in hands)

 

[Wilko]

Is the incoming earth actually connected to the earth bar?

Not any mooore ...

 

[freddo]

No I mean isn't that tail isolated from the earth bar? I don't see any electrical connection between the enclosure and the earth bar
.