Trunking with mixed T+E and singles - regulations query

[s2106fb]

[FONT=&quot]It’s effectively a new build wiring. The plan is to run some large trunking along a wall tight above a CU and several other enclosures containing lighting relays. I’d use singles for links between the enclosures, running up out of one enclosure, into the trunking and down into another enclosure. So far so good. However, I was planning to extend the same trunking up into the ceiling and run several T+Es from the same CU and enclosures up to the ceiling. So technically the trunking contains singles and is open at one end in the ceiling void, where a bunch of T+E emerge (but no singles obviously). It will be around a metre from the open end of the trunking in the ceiling to the nearest single, and with a right angle bend in between. Does this fail regulations? I can't see a safety issue - it would be much easier to pull the front of the trunking off than to get at the open end in the ceiling, but could an inspector look at it and say that the trunking was incomplete? I've had a good search but it's an obscure one. Thanks for any help.

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[telectrix]

seems OK, IMO, but to be sure you could seal the open end of the trunking with a cap, cut out around the T/E s.

 

[IQ Electrical]

I would complete the installation of cables then 'fire stop' the open end of the trunking.

 

[mechelec]

it will still be sealed to IP2X minimum standard

 

[IQ Electrical]

it will still be sealed to IP2X minimum standard

Is that the 80mm long IP2X ?

 

[mechelec]

The test is made with a metallic British standard finger 12.5mm in diameter. Full penetration into the enclosure is not allowed, both joints of the finger may be bent through 90 degrees with respect to the axis of the finger but in one and the same direction only. The finger is pushed without undue force, maximum 10 Newtons, against any opening in the enclosure. If it enters it is placed in every possible position. A low voltage supply not less than 40v and not exceeding 50v is placed in series with a suitable test lamp, the test finger and the live parts within the enclosure, the protection is satisfactory if the lamp does not light. To comply to IP2X the test finger must have adequate clearance from hazardous parts.

for IPXXB
Full penetration of the British Standard test finger to a maximum of 80mm, the test is the same as that stated in IP2X and the finger must not come into contact with hazardous parts to comply to this requirement

 

[s2106fb]

Thanks for all the replies. I think we'll cap the end as best we can. It doesn't sound like it's the obvious no-no that I feared. The only hazards accessible from the end (in the ceiling anyway) are singles over 1m away.