Discuss Screened compartment trunking in the Electrical Forum area at ElectriciansForums.net

Sparksaflyin

Regular EF Member
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Leigh on sea
Anyone come across screened compartment trunking before? If so is anyone aware of any specific reg governing the use of this, in regards to length of run allowed for lv cables in elv side?
 

Flanders

Regular EF Member
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1,403
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Tamworth
Look at reg 528.1 it states 'that every cable or conductor is insulated to the highest voltage present' , if run in the same trunking ,As for screening this is normally part of the cable to prevent interference for example SY cable
 

SWD

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Electrician's Arms
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London
Need to post more information up regarding the job to be honest.

Most screening is just a divider in the trunking, also who spec'd/designed the job as thats down to them to specify in the job spec.
 
OP
Sparksaflyin

Sparksaflyin

Regular EF Member
Messages
181
Location
Leigh on sea
No I mean plastic dado trunking that has a special type of paint in the elv side to provide a screen for interference. First time I’ve come across it tbh.
 
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Sparksaflyin

Sparksaflyin

Regular EF Member
Messages
181
Location
Leigh on sea
I know they shouldn’t be together in the same compartment but sometimes it’s unavoidable and crossing occurs. Also on long runs of cable tray you have the same issue.
 
L

LankyWill

I know they shouldn’t be together in the same compartment but sometimes it’s unavoidable and crossing occurs. Also on long runs of cable tray you have the same issue.
Disagree with the cable tray, i have never seen ELV and LV run on the same tray, you can cross through the dado and use a divider to separate the cables. If your using dado why cant you keep them separate?
 
OP
Sparksaflyin

Sparksaflyin

Regular EF Member
Messages
181
Location
Leigh on sea
They can’t be kept seperate due to the way it’s been designed. I’ve very rarely seen seperate tray runs for elv cables. You can get more than adequate separation on cable tray but like I say, occasionally they will cross over
 
D

Deleted member 26818

Anyone come across screened compartment trunking before? If so is anyone aware of any specific reg governing the use of this, in regards to length of run allowed for lv cables in elv side?
Yes I’ve used it.
Not aware of an specific or non-specific Reg governing it’s use.
If ELV and LV cables are run in the same containment, the insulation of both should be rated at the highest voltage.
Rule of thumb, is that data and LV cables should not be together for more than 1 metre.
 
OP
Sparksaflyin

Sparksaflyin

Regular EF Member
Messages
181
Location
Leigh on sea
Yes I’ve used it.
Not aware of an specific or non-specific Reg governing it’s use.
If ELV and LV cables are run in the same containment, the insulation of both should be rated at the highest voltage.
Rule of thumb, is that data and LV cables should not be together for more than 1 metre.
I had a metre in my head but wasn’t sure if it was a regulation or not. So it’s just a rule of thumb. Thanks for clearing it up.
 
D

Deleted member 26818

The 1 metre rule of thumb applies to data, not ELV.
There is no maximum distance for ELV and LV being run together.
 

sam400

Regular EF Member
Messages
249
Location
sussex
You can get multi compartment trunking that looks like it's been sprayed with copper, I have seen it but never installed it.
 

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