Which IP code?

[normanton]

Im carrying out some testing and inspection for Virgin Media. The tails going into the board do not go through a gromit. I can't get my finger in the opening so I can't put down IP2X but according to the regs IP4X is top of board only! So.... on my recommendations sheet I'm undecided whether to put IP4X or simply "gromit needs to be fitted to protect incoming tails". Any suggestions guys? Thanks

 

[telectrix]

you can put " cable entry not to specified IP rating" code C3.

 

[Spazz]

Put down:
board does not comply with IP4X - quote reg.
Code C3

 

[normanton]

I was under the impression that IP4X only applied to "readily accessible horizontal TOP surfaces"?

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I was under the impression that IP4X only applied to "readily accessible horizontal TOP surfaces"?

 

[Spazz]

Your right- 416.2.1 Live parts must be insulated by at least IP2X

Horizontal Surfaces at least IP4X


So that complies

 

[normanton]

This is the predicament I'm in. It actually passes the IP2X test so in assuming the only thing I can pick up on is the fact there is no gromit protecting the cables on entry? Lol

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This is the predicament I'm in. It actually passes the IP2X test so in assuming the only thing I can pick up on is the fact there is no gromit protecting the cables on entry? Lol

 

[telectrix]

if they come in top , the entry should be IP4X. no grommet needed to protect cables if it's a plastic box.

 

[Spazz]

Just thinking it says IP4X for horizontal surfaces so how does 17th Ed CUs comply when cables enter at the top - the holes are square to allow multiable cables to enter at one time. That gap around the cables is always more than 1mm.

 

[normanton]

Cheers lads that's great

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Cheers lads that's great

 

[telectrix]

Just thinking it says IP4X for horizontal surfaces so how does 17th Ed CUs comply when cables enter at the top - the holes are square to allow multiable cables to enter at one time. That gap around the cables is always more than 1mm.

that's why i always try to bring cables from rear entry, and drill holes for tails. bear in mind that the IP4X requirement is for readily accessible surfaces. if your CU is up against the ceiling, you can get away with a lower IP rating. in any case, there's nothing to stop you squirting a bit of caulk around the cables after all connected up.

 

[Edd]

Just thinking it says IP4X for horizontal surfaces so how does 17th Ed CUs comply when cables enter at the top - the holes are square to allow multiable cables to enter at one time. That gap around the cables is always more than 1mm.

Try always to enter the board from anywhere except the top. If I have no choice or am testing and see gaps at the top I seal them with silicon or cut off bits of sticky trunking.

oh forgot if its a metal board with no grommets then you should put, cables subject to abrasion where entering consumer unit and code it accordingly. C3 if no signs of damage and cables are not likely to move. C2 if insulation is damaged..

 

[Spazz]

Metel is the easier verson but with plastic CUs its a lot harder as the cut outs are square and 5 times bigger than the cable so nothing fits tidy anyway.

Ofcouse if I can I always enter from the back but his is not always possible as I am sure everyone knows