2 - Big Ass Fans

Power wiring guidelines (cont.)12’–24’ BASIC6 Electrical Installation (cont.)27WARNING: To avoid a possible shock hazard and/or nuisance tripping caused by induced voltages, unused wires in theconduit must be grounded at both ends. For the same reason, fan controller output wires should not share a conduit withanother fan controllers output leads, or other power circuits (lighting, motors, etc.).CAUTION: MC or “Metal clad” cable cannot be used for controller output/motor leads. Both stranded and solid corevarieties must be avoided. Do not use solid core cable of any size or insulation class for motor wiring. Use of such typesof cabling may result in nuisance tripping or premature equipment failure.AVERTISSEMENT : Pour éviter un risque de choc ou de déclenchement intempestif dus à des tensions induites, lescâbles non utilisés présents dans le conduit doivent être mis à la terre aux deux extrémités. Pour la même raison, lescâbles de sortie du régulateur du ventilateur ne doivent pas partager un conduit avec les câbles de sortie d’autresrégulateurs de ventilateurs ni d’autres circuits d’alimentation (éclairage, moteurs, etc.)ATTENTION : Ne pas utiliser de câble à gaine métallique pour la sortie du régulateur/l’entrée du moteur. Éviter les câblesaussi bien de type torsadé que rigide. Ne pas utiliser de câble rigide, quelles qu’en soient la taille ou la classe d’isolation,pour le câblage du moteur. Ces types de câblage risquent de provoquer un déclenchement intempestif ou une défaillanceprématurée du matériel.A variety of cable types are acceptable for variable frequency drive installations. For many installations, unshielded cable is adequateif it can be separated from sensitive circuits. In all cases, parallel runs of control and motor cabling should be avoided when unshieldedcable is used. Do not use cable with an insulation thickness of less than 15 mils. Acceptable unshielded typeslimits are provided. Do not use THHN or similarly coated wire in wet areas. Any wire chosen must have a minimum insulation thicknessof 15 mils and should not have large variations in insulation concentricity.Acceptable shielded typesThe drain conductor included with shielded cables must be connected to both the motor frame and the PE/Ground terminal of theLocation Rating / Type DescriptionStandard(Option 1)Standard(Option 2)Maximum cable lengthsRHH/RHW-2Belden 29501-29507 or equivalentor 194ºF) RHH/RHW-2or 194ºF) RHH/RHW-2 Four tinned conductors with XLPE insulation Foil shield and tinned copper drain wire with 85% braidcoverage Three tinned copper conductors with XLPE insulation 5 mil single helical copper tape (25% overlap minimum) withthree bare copper grounds in contact with shield Three bare copper conductors with XLPE insulation withimpervious corrugated continuously welded aluminum armor Three copper grounds on #10 AWG and smallerTo prevent nuisance trips, the distance between the controller and the fan should not exceed 400 ft (122 m).Output disconnectsA device, such as a contactor, that routinely disconnects and reapplies output power to the motor for the purpose of starting andstopping the motor cannot be used.Recommended wire sizeA minimum of 14AWG is acceptable for motor leads. Power feeders to controllers must beWWW.BIGASSFANS.COM ©2012 DELTA T CORP. DBA BIG ASS FAN ALL RIGHTS RESERVED