UFC 3-535-01
17 November 2005
12-4.7
The pressure on a cable or cables being pulled is affected by a radius or
bend in a duct. For non-straight segments of duct the following, based on manufacturer
information, is recommended as a guide in limiting the tension with duct radius (T is the
maximum allowable pulling tension, and R is the radius of the duct):
T(kg) / R(m) < 456[ T(lbs) / R(ft) < 300 ]
12-5
ICE DAMAGE PREVENTION
Water in light bases is very common. In cold regions placing several 51 millimeter by
203 millimeter (2 by 8 inch) closed cell foam disks in the light base will help prevent ice
damage to the base, light fixture and isolation transformer.
179
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