6/2/2010
Page 10 of 25
Electrobar 8-Bar Instruction Manual
005-1044-R8
Chapter 4.0: Conductor Application and Support Spacing
4.1:
Determine if the system is to be horizontal mount (bottom entry) or vertical mount (side entry).
The following table shows the appropriate support spacing.
System Mounting
8-Bar Support
Conductor Every:
Horizontal Mount
5 Feet
90 Amp
Galvanized Steel Conductor
Vertical Mount
4 Feet
Horizontal Mount
5 Feet
110 Amp
Galvanized Steel Conductor
Vertical Mount
4 Feet
Horizontal Mount
5 Feet
250 Amp*
Copper Conductor
Vertical Mount
4 Feet
Horizontal Mount
5 Feet
350 Amp*
Copper Conductor
Vertical Mount
4 Feet
*Joint keeper clips required on all 8-Bar copper conductor systems.
4.2:
Determine the maximum ambient temperature at the conductor system elevation:
4.2.(a):
Under 77° F: use standard PVC insulating covered system.
4.2.(b):
160° F - 280° F: use high heat insulating covered system.
4.2.(c):
Over 280° F: consult the factory.
4.3:
Determine the conductor system required, using a 70% duty cycle with a two minute cycle time
operation (84 seconds on and 36 seconds off).
4.3.(a):
Conductor ampacity considerations.
4.3.(b):
Voltage drop considerations.
4.3.(c):
Expansion considerations (standard rail and building expansion) (Refer to Expansion
Sections on page 16).