High Frequency wiring in trunking with normal circuits??

[davesparks]

Steel conduit would be just as quick and easy, it's only 2x 16A sockets!

If the is an interference issue then SWA won't be the answer, it doesn't have great shielding properties due to the armour not being a complete screen.
This is why SY exists.

 

[shanky887614]

Steel conduit would be just as quick and easy, it's only 2x 16A sockets!

If the is an interference issue then SWA won't be the answer, it doesn't have great shielding properties due to the armour not being a complete screen.
This is why SY exists.

why does it need to be screened? it doesnt if its on its own containment

 

[davesparks]

why does it need to be screened? it doesnt if its on its own containment

That's why i said 'if there is an interference issue'

For what reason does it need to be run seperately if not interference/screening?

 

[Guest77]

I wouldn't consider running these 2 circuits with normal 50 hz low voltage cabling in the same trunking containment myself, Just the way I was trained rather than specific regs regarding it, Just a no way situation, I would just tube them seperately, especially as it is only 9 mtrs, I mean 3 lengths of pipe, no big deal, JMO.

 

[davesparks]

I'm with you on that one, seperate pipe for them.

I don't like this general SWA for everything attitude that is all over the industry these days.

 

[Guest77]

I'm with you on that one, seperate pipe for them.

I don't like this general SWA for everything attitude that is all over the industry these days.

It is because they do not teach conduit in college, it is too expensive, and SWA is reusable unlike pipe after it has been bent, stripped out and reused once, the third time it is usless, SWA can be reused dozens of times saving the skill centres/ Colleges money.

 

[davesparks]

That's just ridiculous, people seem to think that SWA is somehow impervious to damage aswell, they treat it as being equal to steel conduit in that respect.

I wish it had been called something other than 'armour' as people imagine it being impervious to damage, forgetting that a small scratch in the sheath can knacker the cable if water gets near it!

 

[shanky887614]

I wouldn't consider running these 2 circuits with normal 50 hz low voltage cabling in the same trunking containment myself, Just the way I was trained rather than specific regs regarding it, Just a no way situation, I would just tube them seperately, especially as it is only 9 mtrs, I mean 3 lengths of pipe, no big deal, JMO.

? where we get ours from it comes in 2.7m lengths now lol

 

[Guest77]

? where we get ours from it comes in 2.7m lengths now lol

LOL well shop around a bit haha, evening mate.

 

[davesparks]

? where we get ours from it comes in 2.7m lengths now lol

You're being done over!
Steel conduit comes in 3.75metre lengths around here.

 

[shanky887614]

You're being done over!
Steel conduit comes in 3.75metre lengths around here.

not really, they get it in that size and we pay for 2.7m see.

if we need longer stuff like unistrut we will special order it in.

last lot was 6m lengths

 

[davesparks]

Yeah 6m is standard size for metalwork.

3.75m is the magic number for conduit as then 3 saddles + a box at each end satisfies your min fixing distance. Or at least that's what I was taught but no doubt they've changed the rules since then!

 

[Marvo]

We've installed 6000rpm motors which were a 200hz supply. I can't remember what the voltage was but it was in the LV category and we worked to ISO 61000 EMC regs which required we used singles in separate steel trunking and special plugs and sockets we had to order from Marechal.