Cut Sheet

32
Technical Data TD01701001E
Effective March 2017
UL low-voltage busway
Pow-R-Way III
EATON www.eaton.com
Physical data (continued)
Meter center power takeoffs
Meter center power takeoffs (PTO) are designed to tap power off
the busway and feed tenant meter stacks in high-rise applications.
There are two types of power takeoffs, bridge joint and in-line.
Both devices are UL Listed.
Bridge joint PTO
The bridge joint PTO shown in Figure 41 mounts to the right or left
side of the busway at a joint between two sections of busway. The
bridge joint PTO comes with a main circuit breaker or main fusible
switch. Bridge joint PTOs should be ordered with the meter stacks
through the Eaton Lincoln, IL, facility.
The height of the busway bridge joint must be coordinated to meet
local utility/code requirements for minimum/maximum meter socket
heights. All dimensions shown are for reference only showing a
typical installation.
Figure 41. Bridge joint PTO
In-line PTO
The in-line PTO shown in Figure 42 is built integral with the busway,
having the busway pass through the device. This space-saving design
reduces the horizontal wall space by up to 24.00 inches (609.6 mm).
With this device, there is no need to install a separate main device;
saving installation time and money. This device is available with
a main circuit breaker, main fusible switch, or no main device.
In-line PTOs should be ordered with the busway through the
Eaton Greenwood, SC, facility.
The height of the first busway joint up through the floor must be
coordinated to meet local utility/code requirements for minimum/
maximum meter socket heights. The minimum distance from the
surface on which the vertical hanger assembly will be installed on
(finished floor or preformed curb) to the first joint is 16.00 inches
(406.4 mm). Meter stack may be placed to the left, right, or both
sides of the main device. All dimensions shown are for reference
only showing a typical installation.
ote:N If 5-high 200 A meter stacks are used, it is recommended to
increase the bridge joint height from 20.00 inches (508.0 mm) to 22.00–
24.00 inches (558.8–609.6 mm). Attention must be given to the minimum/
maximum heights of the meter sockets.
Figure 42. In-line PTO
C
C
C
OFF
ON
12.26
(311.4)
35.90
(911.9)
38.76
(984.5)
18.17
(461.5)
20.00
(508.0)
30.08
(764.0)
Horizontal
cross bus
Bridge
joint
6.00
(152.4)
Meter
center
front
70.00
(1778.0)
18.00
(457.2)
12.60
(320.0)
12.40
(314.9)
25.00
(635.0)
Vertical
Busway
8.48
(215.4)
125 A meter stack
Wall
Floor
Wall
200 A
Stack
125 A
Stack
70.00
(177.8)
67.34
(1710.4)
Floor
12.45
(316.2)
12.39
(314.7)
30.88
(784.35)
25.00
(635.0)
20.00
(508.4)
20.00
(508.4)
.50
(12.7)
.61
(15.5)
13.51
(343.2)
1.93
(49.0)
8.55 (217.2)
12.26
(311.4)