Cut Sheet

44
Technical Data TD01701001E
Effective March 2017
UL low-voltage busway
Pow-R-Way III
EATON www.eaton.com
Power takeoff sections
Power takeoff sections are used to tap up to 1200 A of power off of
the busway. A power takeoff section must be used when power in
excess of the current-carrying capabilities of the plug-in stabs (800 A)
is required. A bolt-on fusible switch or circuit breaker unit can then
be bolted to the power takeoff.
Bridge joint power takeoff (Figure 68)
A bridge joint power takeoff is a special connection that allows for
the attachment of a bolt-on unit at the bridge joint. The bridge joint
power takeoff and a bolt-on unit can be used to tap off power where
plug-in busway is not available. A bridge joint power takeoff can be
rated up to 1000 A.
Figure 68. Bridge power takeoff
Built-in power takeoff (Figure 69)
A built-in power takeoff is a special piece of feeder busway that
allows for the attachment of a bolt-on unit. Built-in power takeoffs
are used where space restrictions dictate that the wide dimensions
of the busway be flat against the wall, ceiling, or other obstruction.
In this application, power takeoffs and bolt-on units are used instead
of plug-in units. A built-in power takeoff can be rated up to 1200 A.
Figure 69. Built-in power takeoff
Plug-in cable tap boxes (Figure 70)
Plug-in cable tap boxes are used to feed the busway run, or where
equipment served by the busway is connected without overcurrent
protection. Plug-in cable tap boxes plug into any Pow-R-Way III
busway (225–5000 A) plug in opening.
Figure 70. Plug-in cable tap box
Table 59. Plug-In cable tap box details
Ampere
rating
Dimensions in inches (mm)
Compression conn./
Phase and N Mechanical lugs/phase and N
Catalog
numberA B C D English Metric English Metric
200 19.50 (495.3) 15.50 (393.7) 7.12 (180.8) 7.50 (190.5) (1) (1) — — P3PTB200C
200 19.50 (495.3) 15.50 (393.7) 7.12 (180.8) 7.50 (190.5) — — (1) #4–350 kcmil (1) 21.2–177 mm
2
P3PTB200M
400 26.25 (666.7) 21.00 (533.4) 10.00 (254.0) 7.50 (190.5) (1) (1) — — P3PTB400C
400 26.25 (666.7) 21.00 (533.4) 10.00 (254.0) 7.50 (190.5) — — (1) 250–750 kcmil or
(2) 3/0–250 kcmil
(1) 127–380 mm
2
or
(2) 85.0–127 mm
2
P3PTB400M
600 30.00 (762.0) 24.75 (628.6) 10.50 (266.7) 12.80 (325.1) (2) (2) — — P3PTB600C
600 30.00 (762.0) 24.75 (628.6) 10.50 (266.7) 12.80 (325.1) — — (2) 250–750 kcmil or
(4) 3/0–250 kcmil
(1) 127–380 mm
2
or
(4) 85.0–127 mm
2
P3PTB600M
800 30.00 (762.0) 24.75 (628.6) 10.50 (266.7) 12.80 (325.1) (3) (3) — — P3PTB800C
800 30.00 (762.0) 24.75 (628.6) 10.50 (266.7) 12.80 (325.1) — — (3) 250–750 kcmil or
(6) 3/0–250 kcmil
(3) 127–380 mm
2
or
(6) 85.0–127 mm
2
P3PTB800M
Load
Line
D
A
N
G
E
R
D
A
N
G
E
R
F
P. T.O.
Bolt-on Circuit Breaker
Unit or Fusible Switch
Pow-R-Bridge
C
L
17.00
(431.8)
(Minimum)
6.94
(176.3)
9.00
(228.6)
15.00
(381.0)
17.00
(431.8)
(Minimum)
15.00
(381.0)
6.94
(176.3)
9.00
(228.6)
Pow-R-Bridge
Pow-R-Bridge
P. T.O.
Edgewise Mounted
Single Bar
Per Phase Only
Flatwise Mounted
Available in Single and
Double Bars Per Phase
P. T.O.
C
L
F
T
C
L
C
L
C
L
A
B
C
D
Top View
Side View