You will probably find the contractors are all on price mate, don't take it to heart, it's hard enough to make money without one arm tied behind your back!.
Your task is to work out how to be an asset to them while still learning
This is why for the extra cost on these kind of installs, I bung in a length of 4" trunking, 2" bushed and earthed. Then I gland all my SWA's in, bolt through the banjo but no tail required.
I can just imagine some health and safety nob, standing with a standard smoke head in his had looking at a 40m ceiling above a ladle lol..........
In seriousness super aggressive environments like a foundry would have a fire risk assessment these days that would call for manual detection only...
Good point mike!
We have to interlock extraction Canopies because of the gas regs, in complete madness the gas regs do not call for the intake to be interlocked too!, however like mike I use dual pressure switches and interlock both!!.
And all air handling is normally interfaced to the fire...
Gas valve also needs to be linked into the extraction system over the cookers, if the extraction is off then the gas won't operate.
I normally use the fire alarm to shut down all air handling plant, including the kitchen extract!. Which then shuts the gas down, saves on interfaces lol
That there is pretty much the model way to do it, I put in some really big systems, we have an fire partner, we contract to them as install contractors, the provide us with design, supply and commission services providing us access to so pretty nifty managed protocol systems.
I get them out of...
If it's warranty and after service your looking for then Hilti is the one you want!!.
2 years, absolutely no cost service promise, maximum 72hr turn around and possibly the best service I've ever had!!.
The no cost promise also covers routine servicing if your a bit ---- about having tools...
Not exactly a bargain !!! ....
http://www.sparkydirect.co.uk/product/2446/9831/JK216BG/Hager-16-Way-250-Amp-TPN-Distribution-Fuseboard-With-Glazed-Door-/index.html
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