Advice on designing an electrostatic-proof building please.

[Mark42]

Did you buy the suit off the guy from Boney M?

No.
I sold him my spare one.

 

[pc1966]

Fun fact (well, not for him) is that Bobby Farrell died in St. Petersburg on the anniversary of Grigori Rasputin's death.

Oh those Russians...

 

[DPG]

Fun fact (well, not for him) is that Bobby Farrell died in St. Petersburg on the anniversary of Grigori Rasputin's death.

Oh those Russians...

Always a source of good information this forum.

 

[Mark42]

OK, that's enough reminiscing . I'm ordering trunking to use as dado rail today.

Unitrunk looked excellent, until I looked at the price: 100 x 50 x 3m is £193! I though it was a typo.

Very similar Tamlex 100 x 50 x 3m from CEF is £24.17.

I'd have to cut my own holes in the Tamlex, but for an overall saving of £1,012 (!) I think I'll get the jig saw out

 

[pc1966]

Unitrunk looked excellent, until I looked at the price: 100 x 50 x 3m is £193! I though it was a typo.

That is the list price. Most electrical trade places will give you discounts of the order of 70-90% on that if you ask the right folk.
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If your company are doing a lot of this sort of work (internally, not as electrician services, etc) it might be in your interests to apply for a trade account with one or two of the local wholesalers.
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Is the trunking just for a set of 13A sockets? you might find it easier to use the likes of these and glands/Flexishield between them:

MK Electric K2946ALM Metalclad Plus 2 Gang Double Pole Switchsocket With Surface Mounting Box 13A - Shop4 Electrical

Buy MK Electric K2946ALM Metalclad Plus 2 Gang Double Pole Switchsocket With Surface Mounting Box 13A. Shop today.

www.discount-electrical.co.uk

 

[KennyKen]

If you have explosive material or potential to become explosive then you’ll first need to follow Hazard area classification depending on what chemical or potentially explosive Material you are using. Normally cabling would Have to be intrinsically safe ie the use of shunt diodes or enclosures would have to be EX rated depending on the application. EX D is flameproof, EX P is pressurisation of an enclosure. EX E is extra protection and so on. Zoning is generally 0,1 and 2 and that basically goes on your LRL & URL limits.

 

[Mark42]

If you have explosive material or potential to become explosive then you’ll first need to follow Hazard area classification depending on what chemical or potentially explosive Material you are using. Normally cabling would Have to be intrinsically safe ie the use of shunt diodes or enclosures would have to be EX rated depending on the application. EX D is flameproof, EX P is pressurisation of an enclosure. EX E is extra protection and so on. Zoning is generally 0,1 and 2 and that basically goes on your LRL & URL limits.

Thanks for the ideas, but those regs are for explosive atmospheres, as often found in chem plants, or offshore. It has nothing to do with explosive substances. It's a very frequent confusion, especially among regulators.

Think about it - a sparky switch would definitely ignite a gas/air mixture permeating the whole area, but the same sparky switch would not jump across a room and set off a pile of nitrocellulose propellant sitting on a lab bench. It's only static protection which is important to consider in the latter case.
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That is the list price. Most electrical trade places will give you discounts of the order of 70-90% ...

Yeah, it's stupid isn't it? Like arguing with Travis Perkins. We do have trade accounts and I'm good at getting best prices, but not many places advertise the Unitrunk stuff, so it's perhaps too much effort.

Update: I just checked, it appears Unitrunk only sell direct from their own places, and there's no central tel number, only published (massive) list prices and an email form. They appear to be one of those companies which makes it hard to buy from them. Marketing people call this having a 'customer prevention department' I can't be bothered! cf. Two clicks on CEF and Tamlex product can arrive tomorrow ...

Is the trunking just for a set of 13A sockets? ...

No, it's for power, data, telelphone and a DC lab supply as well. Hence the flexibility of using trunking.

 

[Julie.]

I take it that using nitrocellulose propellant, you are loading ammunition, anything interesting?

 

[Mark42]

I take it that using nitrocellulose propellant, you are loading ammunition, anything interesting?

Not exactly, but yes, interesting. Do you shoot? or maybe ex-forces?

 

[Julie.]

Not exactly, but yes, interesting. Do you shoot? or maybe ex-forces?

Yes I shoot, also section 5