Three phase DB, water, you can geuss!

[Knobhead]

We’re talking of power feeds to a MCC so possibly a 1200A feed. I don’t think it would fit in a CU.

Read through a post before commenting.

 

[RISElectrical]

We’re talking of power feeds to a MCC so possibly a 1200A feed. I don’t think it would fit in a CU.

Read through a post before commenting.

Correction, that's what you were talking about. The OP and indeed all the first page mention noting above 50A and 4mm. The attached pictures are of MCBs that 185mm wouldn't fit in to them would they?

I was merely making the point (someone else already made it earlier in the thread!!) about the principal of a ring so it relates to other areas as many people don't know about cables in parallel.

 

[J25GTi]

Lets hope they have sorted the leak in the roof!!
What I would say is, it looks if the MCB they put in is the right way round, the MCB spring clip is supposed to be on the outside, well hager boards always state it.

Yes I got a builder in to sort the leak from the roof, So we solved the problem and the cause of the problem, making for one very happy customer and then no future issues

 

[J25GTi]

Correction, that's what you were talking about. The OP and indeed all the first page mention noting above 50A and 4mm. The attached pictures are of MCBs that 185mm wouldn't fit in to them would they?

I was merely making the point (someone else already made it earlier in the thread!!) about the principal of a ring so it relates to other areas as many people don't know about cables in parallel.

This would be my college tutors fault (4 years ago now? jeez time flies)

As he always instilled the view on us that rings were inherently dangerous if you lost a leg etc then you have 2x 25a cables running on a 32a mcb etc. So this would be where i have formed this opinion from.

Obviously where practicable it would be better to use one single cable, but in alot of instances it obviously isnt practicable.

In the case of this supply i dont see why there is any reason to use parallel supplies for the length of cable it was just lazyness as they didnt happen to have any of the right size cable i imagine.

 

[Engineer54]

As he always instilled the view on us that rings were inherently dangerous if you lost a leg etc then you have 2x 25a cables running on a 32a mcb etc. So this would be where i have formed this opinion from.

Yet another collage lecturer that perpetuates his own personal views on to his students, ....inherently dangerous, what a complete plonker!! I wonder what he would of made of a 3 phase ring circuit that are commonly used in industry??

As for the parallel feed, not something i would have done myself, but never the less, fully compliant!!

 

[mark ju]

Parallel supplies are quite common as stated, but to get back to the original post, nice install, keep that up and i'd let you work with me!