Electrification FS Conductor Bar System Instruction Manual
October 2019
Page
22
of
34
Chapter 7.0: Electrification FS Expansion Elements
7.1:
Galvanized Steel Elements (90A and 110A)
7.1.(a):
Systems not exceeding 490’ do not require expansion elements when installed with an
anchor hanger at the center of the line. In systems that are longer than 490’, expansions are
needed every 240’, based on 100°F range in ambient temperature during the year. Use an
expansion every 190’ if the ambient temperature range could be 125°F.
7.2:
Copper Elements (250A and 400A)
7.2.(a):
Systems not exceeding 490’ do not require expansion elements when installed with an
anchor hanger at the center of the line. In systems that are longer than 490’, expansions are
needed every 165’, based on a 100°F range in ambient temperature during the year. Use an
expansion every 130’ if the ambient temperature range could be 125°F.
FINGERSAFE BAR
90 Amp, 110 Amp & 125 Amp Galvanized Steel
Conductors
250 Amp & 400 Amp Copper Conductors
Conductor
Length
Anchors
Required
Expansions
Required
Conductor
Length
Anchors
Required
Expansions
Required
Up to 490’
2*
0
Up to 490’
2*
0
491’ to 730’
2
1
491’ to 650’
2
1
731’ to 970’
3
2
651’ to 810’
3
2
971’ to 1210’
4
3
811’ to 970’
4
3
971’
to
1130’
5
4
* Install one set of anchors on each side of center Joint Assembly.
NOTE: Additional expansions may be required for outdoor applications, please consult the factory.
7.3: Expansion
Assembly
Installation
7.3.(a):
Allow sufficient time for the line elements to equalize to the ambient temperature of 77°F
within the installation area. Then locate the expansion assemblies, consisting of a pre-
engineered 15’ assembly.
7.3.(b):
Insert the expansion at required locations along the runway.
7.3.(c):
Standard Hangers to be installed at 5’ 0” centers along the system.