Ex-proof installation advice req'd
Ex-proof installation advice req'd
(OP)
We are supplying a captive coal-burning power plant ex-proof rotary electric vibrators as material flow aids. Their req'ts are not well defined as to their need for ex-proof equipment; the impression we rec'd was that the ex-proof req'ts were being explored so they would have the option to burn hi-energy-yield coal, which is more hazardous in nature.
The supplier of the ex-prf electric vibrators supplies a "wiring kit for hazardous locations" that includes SEOW-A cable, which is: "SEOW-A Extra hard service cord. Thermoplastic elastomer, oil resistant (TPE) construction Jacket. 600 volt, weather resistant for outdoor use."
Is this cable considered ex-proof, or should we instead use flexible ex-proof conduit + cable (and then, what type of cable)??
Either way, the SEOW-A cable or flex conduit will enter an ex-prf JB, which is fed thru rigid, so I think they are AOK from the ex-prf JB back. But the bridge 'tween the JB and the vibrator, which must have some flexibility is the issue.
Thanks in advance for your responses.
BK
The supplier of the ex-prf electric vibrators supplies a "wiring kit for hazardous locations" that includes SEOW-A cable, which is: "SEOW-A Extra hard service cord. Thermoplastic elastomer, oil resistant (TPE) construction Jacket. 600 volt, weather resistant for outdoor use."
Is this cable considered ex-proof, or should we instead use flexible ex-proof conduit + cable (and then, what type of cable)??
Either way, the SEOW-A cable or flex conduit will enter an ex-prf JB, which is fed thru rigid, so I think they are AOK from the ex-prf JB back. But the bridge 'tween the JB and the vibrator, which must have some flexibility is the issue.
Thanks in advance for your responses.
BK





RE: Ex-proof installation advice req'd
RE: Ex-proof installation advice req'd
Don
RE: Ex-proof installation advice req'd
What we have decided to do is leave this up to customer, giving the choice of the "wiring kit for hazardous locations" which contains the SEOW-A cable, or Cross-Hinds ex-proof flex conduit, thru which would be fed cable, likely the SEOW-A or SOOW of sufficient ampacity. Our recommendation is the latter; anthing short of that is not rated ex-proof. The vibes pull less than 2 amps, and the cable will likely be AWG 12, unless someone has a better idea.
BK
RE: Ex-proof installation advice req'd