AL vs RGS conduit in a corrosive areas for analog signalling cable, is there an issue with AL cond?
AL vs RGS conduit in a corrosive areas for analog signalling cable, is there an issue with AL cond?
(OP)
We have a standard at this plant that requires RGS conduit for analog signalling conduit. However it's been pointed out that this area has proven to be highly corrosive due to the raw material used at the site and its reaction with steel, rain, etc over time.
The question is...which is worse....corrosion - which we know will be a future problem, or some kind of electrical noise issue with the AL conduit? Like what is the issue with AL conduit and analog signalling?
The question is...which is worse....corrosion - which we know will be a future problem, or some kind of electrical noise issue with the AL conduit? Like what is the issue with AL conduit and analog signalling?






RE: AL vs RGS conduit in a corrosive areas for analog signalling cable, is there an issue with AL cond?
http://www.steeltubeinstitute.org/pdf/conduit/ASCO...
"According to the study, steel conduit can reduce EMF at 60 Hz power frequency levels by as much as 95%. It showed that aluminum conduit reduced EMF by just 10%, and that nonmetallic conduit was ineffective in reducing field levels."
http://www.wheatland.com/electrical-conduit
"Electrical Conduit
We supply a full range of steel conduit (RMC, IMC and EMT) that offers superior physical protection for electrical conductors, is recognized as an equipment grounding conductor by the NEC® and acts AS AN EFFECTIVE shield against electrical magnetic interference (EMI). All three products are available in 10-foot lengths. Many trade sizes of RMC and EMT are also available in 5-ft and 20-ft. lengths, which helps speed installation, and reduce costs.
Wheatland also supplies Rigid Aluminum Conduit (RAC), which provides: extra protection in most corrosive and industrial atmospheres, ease of installation, reduced maintenance costs and a bright, attractive appearance"
RE: AL vs RGS conduit in a corrosive areas for analog signalling cable, is there an issue with AL cond?
http://www.tnb.com/pub/node/942
RE: AL vs RGS conduit in a corrosive areas for analog signalling cable, is there an issue with AL cond?
RE: AL vs RGS conduit in a corrosive areas for analog signalling cable, is there an issue with AL cond?
I'd worry about aluminum's natural oxide film making it useless for equipment grounding, and it's already next to useless for shielding, so I'm not seeing an upside to it.
Mike Halloran
Pembroke Pines, FL, USA
RE: AL vs RGS conduit in a corrosive areas for analog signalling cable, is there an issue with AL cond?
SceneryDriver
RE: AL vs RGS conduit in a corrosive areas for analog signalling cable, is there an issue with AL cond?