Low Voltage explosion Proof wiring Installation which is total disaster waiting t happen. No wonder so many problems at plants with explosive products.

 I often work in plants that have explosive  and dangerous atmospheres where specialized explosion proof wiring is required.

All too often these installs are totally wrong and will not prevent an explosion and can actually cause them.

Take this latest facility I was working in an old pain manufacturing plant on Neville Island .

A well known national alarm company with 3 initials  failed when it came to installing the fire alarm system in a 

Class 1 Division 1  area of the plant.

First off although they use the correct explosion proof Tamper Switch on the valve the Sprinkler System the flexible plastic is incorrect it has to be metal seal-tight that is gas impermeable .

https://www.larsonelectronics.com/blog/2018/11/13/explosion-proof/when-to-use-seal-offs-and-barriers-for-explosion-proof-equipment/

Second the seal off as seen below which prevent explosive gasses from back flowing thru the rigid steel pipe is not filled with the cement type  compound  all around wires that seals off the pipe .

This company had no business installing in a hazardous atmosphere unless they know what they are doing and its very clear they do not .

I see ppeople posting all the time in alarm groups on social media asking about hazardous and explosive 

setups and when i tell them to employee an electrician who is trained and knows how to do this work they get offended.

You have no business install in these atmospheres unless you fully understand the NEC Codes .

and I just don't see this with low voltage I see it all the time with higher voltages which is really scary.