Cutler-Hammer Busway Systems - Eaton Canada
Cutler-Hammer Busway Systems - Eaton Canada
Cutler-Hammer Busway Systems - Eaton Canada
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<strong>Cutler</strong>-<strong>Hammer</strong><br />
Fittings, Continued<br />
Crosses<br />
A cross is a busway fitting suitable for<br />
connection in four directions. It is used<br />
where a run of duct branches off in three<br />
directions in the same plane.<br />
Expansion Joint<br />
Expansion joints accommodate the expansion<br />
and contraction of bus bars with<br />
respect to the enclosure. They are necessary<br />
to compensate for the difference in the<br />
coefficient of expansion of steel housing and<br />
copper or aluminum bus bars.<br />
An expansion joint should be installed in the<br />
center of extremely long runs of the busway.<br />
If such runs have an end closer at one end,<br />
so that the bus bars are free to move, or if<br />
the run contains elbows, expansion joint<br />
may be omitted.<br />
Expansion joints must also be used wherever<br />
a run of busway crosses an expansion<br />
joint in a building. The use of expansion<br />
joints should be engineered for individual<br />
installations.<br />
➀ Dimensional purposes only. Pow-R-Way II is standard<br />
design in this rating.<br />
➁ 225A and 400A (Pow-R-Way II) is 5 1¦32 inches total width.<br />
➂ B dimension is centered on “F” side of duct.<br />
March 2001<br />
Application Data<br />
30-560<br />
Page 15<br />
Pow-R-Way ® <strong>Busway</strong> <strong>Systems</strong><br />
Dimensions in Inches
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