Guidelines for planning the electrical installation 65Note: Do not install motor wiring from more than one drive in the same conduit.Armored cable / shielded power cableSix conductor (3 phases and 3 ground) type MC continuous corrugated aluminum armorcable with symmetrical grounds is available from the following suppliers (trade names inparentheses):• Anixter Wire & Cable (Philsheath)• BICC General Corp (Philsheath)• Rockbestos Co. (Gardex)• Oaknite (CLX).Shielded power cables are available from Belden, LAPPKABEL (ÖLFLEX) and Pirelli.Planning the braking systemSee chapter Resistor braking.Selecting the control cables ShieldingAll control cables must be shielded.Use a double-shielded twisted pair cable for analog signals. We recommend this type ofcable for the pulse encoder signals also. Employ one individually shielded pair for eachsignal. Do not use common return for different analog signals.A double-shielded cable (figure a below) is the best alternative for low-voltage digitalsignals but single-shielded (b) twisted pair cable is also acceptable. Signals in separate cablesRun analog and digital signals in separate, shielded cables. Never mix 24 V DC and115/230 V AC signals in the same cable. Signals allowed to be run in the same cableRelay-controlled signals, providing their voltage does not exceed 48 V, can be run in thesame cables as digital input signals. The relay-controlled signals should be run as twistedpairs. Relay cable typeThe cable type with braided metallic screen (for example ÖLFLEX by LAPPKABEL,Germany) has been tested and approved by ABB.a b
