Cut Sheet

34
Technical Data TD01701001E
Effective March 2017
UL low-voltage busway
Pow-R-Way III
EATON www.eaton.com
Physical data (continued)
Busway-connected panelboards
Pow-R-Way III busway-connected panelboards save space and
installation time by eliminating the need to install a bus plug and
cable over to a panelboard. This special enclosure plugs directly on to
vertical busway and accepts Eaton PRL1a, PRL2a, and PRL3a main
circuit breaker panelboard interiors. The enclosure also accepts
28.00 inch (711.2 mm) wide standard and EZ trims. The panels can
be top or bottom fed and can mount on either side of the busway.
Each panel is UL 857 Listed.
ote:N These panels are not seismic rated.
Busway-connected panelboards are sold and shipped through
the Eaton regional satellite plants and coordinated with the Eaton
busway plant in Greenwood, SC. See Figure 46.
Panelboard spring hangers
The specialized spring hanger shown in Figure 47 allows the panel
to be anchored and supported directly to a wall, and uniquely allows
the panel to float with the riser busway. Panelboard spring hangers
are sold separately as a busway accessory. Hardware is included to
mount the spring hangers to the panelboard enclosure.
Table 47. Panelboard enclosure detail
MCB
frame
Maximum
box size MCB height
Busway
joint
height
Box height
off floor
Minimum
floor-ceiling
height
Dimension in inches (mm)
A B C D
PRL1a and 2a main circuit breaker
F 40.00 (1016.0) 72.00 (1828.8) 23.00 (584.2) 47.00 (1193.8) 103.00 (2616.2)
F 52.00 (1320.8) 72.00 (1828.8) 23.00 (584.2) 35.00 (889.0) 103.00 (2616.2)
F 64.00 (1625.6) 72.00 (1828.8) 23.00 (584.2) 23.00 (584.2) 103.00 (2616.2)
J 76.00 (1930.4) 72.00 (1828.8) 33.00 (838.2) 21.00 (533.4) 113.00 (2870.2)
K (500) 94.00 (2387.6) 74.00 (1879.6) 34.00 (863.6) 4.00 (101.6) 114.00 (2895.6)
K (750) 94.00 (2387.6) 72.00 (1828.8) 36.00 (914.4) 6.00 (152.4) 116.00 (2946.4)
PRL3a main circuit breaker
F (4/0) 76.00 (1930.4) 72.00 (1828.8) 23.00 (584.2) 11.00 (279.4) 103.00 (2616.2)
FCL 76.00 (1930.4) 72.00 (1828.8) 23.00 (584.2) 11.00 (279.4) 103.00 (2616.2)
FB 76.00 (1930.4) 72.00 (1828.8) 23.00 (584.2) 11.00 (279.4) 103.00 (2616.2)
J 76.00 (1930.4) 72.00 (1828.8) 23.00 (584.2) 11.00 (279.4) 103.00 (2616.2)
K (500) 94.00 (2387.6) 74.00 (1879.6) 34.00 (863.6) 4.00 (101.6) 114.00 (2895.6)
K (750) 94.00 (2387.6) 72.00 (1828.8) 36.00 (914.4) 6.00 (152.4) 116.00 (2946.4)
L 94.00 (2387.6) 72.00 (1828.8) 34.00 (863.6) 4.00 (101.6) 114.00 (2895.6)
LCL 94.00 (2387.6) 72.00 (1828.8) 38.00 (965.2) 8.00 (203.2) 118.00 (2997.2)
LA 94.00 (2387.6) 72.00 (1828.8) 34.00 (863.6) 4.00 (101.6) 114.00 (2895.6)
LG 94.00 (2387.6) 72.00 (1828.8) 36.00 (914.4) 6.00 (152.4) 116.00 (2946.4)
Edge of Busway
to Wall
Top Conduit
Space
Top View
Third Plug-In Opening
Up From Lower Joint
A
B
C
Front View
2.37
(60.2)
6.00
(152.4)
28.00
(711.2)
Figure 46. Busway-connected panelboard detail
Figure 47. Panelboard spring hangers