Harrington Hoists and Cranes Series 3 End Truck - Manual (Page 34)

3.6 Power Source

For crane systems requiring electrical power, ALWAYS provide crane runways
with Class 3 grounding. Failure to provide an electrical ground in accordance with industry
standards and local codes could result in electric shock. NEVER paint any wheels or wheel
running surfaces in order to ground the crane properly.

Provide electrical power to the crane and any powered components in accordance
with applicable industry standards, local codes, and manufacturer's requirements. Sections 3.6.1 and
3.6.2 below provide general guidelines for typical configurations.
3.6.1 Power supply with enclosed conductors. (See Figure 3-17)
1 1
I n c h e s
2
I n c h e s
1 1 - 1 5 . 5
I n c h e s
N o . 5 2 7
C o l l e c t o
B r a c k e t
A s s e m b
1 I n c h
S q u a r e
B a r
6
I n c h e s
1 1
I n c h e s
6 t o 7 I n c h
1 I n c h
S q u a r e
B a r
N o . 5 2 7 1 1 C o l l
B r a c k e t A s s e m b
Figure 3-17 Collector Bracket Assembly Mounting
3.6.2 Power supply with festooned cable. (See Figure 3-18)
Bridge Guide
Wire
Electric
Hoist
Hoist Power Cable
Crane Power Cable
Power Source
Crane Guide Wire
Terminal Box
End Truck
Bridge Beam
Crane Runway
Figure 3-18 Typical Festoon Cable System
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