IEEE 576-2001 pdf download IEEE Recommended Practice for Installation, Termination, and Testing of Insulated Power Cable as Used in Industrial and Commercial Applications
4.4.2.3 Minimizing pulling tensionIn order to minimize the pulling tension on the cable(s), the cable should be fed into the duct runfrom the end nearest the bend.
4.5 Check list prior to pulling cable
Be sure there is adequate clearance between duct or conduit diameter and cable diameter. Theapercent fillrequirements should not be exceeded.
Use adequate lubrication of the proper type to reduce friction in conduit and duct pullsThe grease and oil type lubricants used on lead sheathed cables should not be used on nonmetallic sheathed cables. There is a number of commercially available wire pulling compoundsthat are suitable for use with non-leaded cables.
Avoid sharp bending of the cable at the first pulley in overhead installations by locatingcthe pay-off reel far enough away from the first pulley that the lead-in angle is kept relatively flatAfter installation, check to determine that end seals are still intact and have not been damageddto the point where water could enter, Apply suitable end scals to help protect against damageif the cable will be subjected to immersion or rain, This is particularly important if there will bea delay of some time between the pulling operation and splicing and terminating.
Be sure to check the maximum tension limits of the cable pulling accessories (cable grips, pullingeyes, swivels, pull rope, etc.). They should have a capacity equal to or greater than the tensionlimits that are required to pull the cable.
4.6 Methods of gripping cables for pulling
In general, insulated cables may be gripped either directly by the conductors or by a basketweavepulling grip applied over the cables. The method used depends on the anticipated maximum pullingtension. When pulls are low tension, a basketweave grip is used. High tension pulls will requireconnecting to the conductor either by means of pulling eyes or by forming a loop with the conductoritself, In some instances, it is desirable to use a grip over the outer covering in addition to theconductor connection to prevent any slippage of one with respect to the other
4.6.1 Non-metallic sheathed cables
The smaller sizes of non-etallic sheathed cables are usually gripped directly by the conductorsby forming them into a loop to which the pull wire or rope can be attached. The insulation oneach conductor is removed before the loop is formed. Larger sizes are more easily handled by applyinga pulling grip over the cable or cables, provided the pull is not too severe.
If more than one cable is involved, the ends should be bound together with friction tape beforeapplying the grip overall. Long, hard pulls will necessitate the use of pulling eyes.
4.6.2 Lead sheathed cables
Pulling eyes for lead sheathed cables can be applied either at the factory or in the field. They mustbe wiped or sealed by other suitable means to the lead sheath to prevent the entrance of moisture.For shorter pulls a basketweave grip may be applied over the lead sheath or over the jacket if one ispresent over the lead sheath.
4.6.3 Metal clad cables
In pulling metal clad cable it is necessary to grip the armor and the conductors. This can beaccomplished in a number of ways. One method requires that a portion of the armor be removed.Friction tape is then applied over the armor and down over the conductors, and a long basketweavegrip is applied in such a way that it grips both the armor and the conductors. Another method requiresthat two holes be drilled through the cable (armor and conductors) at right angles to cach otherand that a loop be formed by passing steel wires through the holes and out over the end of the cableA third approach would be to use a pulling eye and a grip together, the grip being applied over thearmor to prevent its slipping back, The armor is not a tension member, Be certain pulling load istaken by the conductors.
IEEE 576-2001 pdf download
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