Equipment Installation Guidelines
Standards
Follow the correct electrical installation procedure and legislation (IEEE Regs)
Junction Boxes
DO check area classification for junction box suitability
DO use boxes appropriate to the environment
DO ensure correct IP rating for the environment
DO use adequate sizes of field junction boxes
DO allow for spare ways and future expansion
DO mount field junction boxes at working height
DO remember that water can’t get OUT of weatherproof boxes once it is inside!
DO employ a weather resistant tag to identify the equipment
DO prevent water/product ingress through the cables/glands – enter box from side or bottom
DO plug all unused ports with appropriate stoppers
DO clean out the junction box after installation
Cables
DO check area classification for cable type
DO ensure cable runs and distances to sensors are as recommended by the manufacturer of the
equipment
DO document and record all cable routes
DO use the correct size and type of cable for the application – screened cable for instrumentation
DO keep signal cables away from power cables
DO ensure that loop resistance values are not excessive
DO ensure that the cable is of suitable quality for its intended environment
DO avoid major sources of electrical interference when planning cable runs, away from motors etc.
DON’T exceed maximum cable parameters for IS systems
DON’T run the cable over sharp edges or around overly tight bends
DON’T overstress cable support cleats/ties
Glanding
DO check area classification for gland type
DO get it right first time. It is very difficult to correct it later
DO use the right type of gland for the application
DO leave generous service loops in the sensor cables
DO fit a sealing washer if required for weatherproofing
DO ensure that any RFI shield is properly isolated from safety earth metalwork and gland body
DO ensure that the SWA earthing is continuous and vibration proof
DO ensure that the cable sheath makes a weatherproof seal
DO fully tighten all fittings
DON’T use tape for weatherproofing
DON’T hide bad workmanship under shrouds
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