Hello,
I have a question regarding the wiring practice for hazardous
locations. I am still learning.
Please see picture.
The RTD wired to an explosion proof terminal head rated for Class 1 Div 2, inside a Class 1 Div 2 Group
building. Wiring runs outside of the building (explosion proof building)
through a conduit seal (to prevent passage of gas or vapors) and terminates in a
junction box. From there the signal goes to the TT and off to the control room.
The TT is not explosion proof enclosure , just standard.
Is this safe wiring?
Should an intrinsically safe barrier be installed between TT or
JB? Or maybe replace TT with instrinsically safe, explosion proof?
I think the wiring is not safe cause high energy level can come from the TT or control room and transmitte the hazardous area and cause a spark through the wire.
Thanks for the help in advance.
I have a question regarding the wiring practice for hazardous
locations. I am still learning.
Please see picture.
The RTD wired to an explosion proof terminal head rated for Class 1 Div 2, inside a Class 1 Div 2 Group
building. Wiring runs outside of the building (explosion proof building)
through a conduit seal (to prevent passage of gas or vapors) and terminates in a
junction box. From there the signal goes to the TT and off to the control room.
The TT is not explosion proof enclosure , just standard.
Is this safe wiring?
Should an intrinsically safe barrier be installed between TT or
JB? Or maybe replace TT with instrinsically safe, explosion proof?
I think the wiring is not safe cause high energy level can come from the TT or control room and transmitte the hazardous area and cause a spark through the wire.
Thanks for the help in advance.