Section 3 Installation Load Limit
9ARD000015-600 71
Load Limit
For examples of maximum electric current that can flow on the network power bus
for each cable type, refer to section Cable Types on page 21. The maximum drop
line electric current depends on the length of the drop line.
The electric current limits for drop lines are listed in Table 56. The electric current
limit is described by the following equations:
I = 15/L
where I is the allowed drop line electric current in amps and L is the drop length in
feet, or:
I = 4.57/L
where I is the allowed drop line electric current in amps and L is the drop length in
meters.
The operating electric current of the device represents the average electric current
drawn from the bus.
If the maximum operating electric current of the device exceeds the average
electric current by 10%, then the maximum operating electric current must be
specified in the product data sheet.
Table 56. Maximum allowed Drop Line Electric Current
Drop Length
(ft)
Maximum Allowable Electric
Current (amps)
13.0
33.0
53.0
7.5 2.0
10 1.5
15 1.0
20 0.75
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