Conductor Sizing And Routing - Joslyn JSP series Installation, Operation And Maintenance Manual

JoslyN JsP iNsTAllATioN, oPerATioN AND MAiNTeNANce MANuAl
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Figure 5
3-Phase, 4-Wire high-Leg Delta

Conductor Sizing and Routing

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CAUTION: JSP's performance will be limited severely if the
conductors are (a) too long, (b) are of too small a wire gauge, (c) have
too many bends or (d) have sharp bends. For optimum performance
never exceed 10' conductor lengths.
Joslyn recommends installing the JsP unit by following conductor size for
phase, ground and neutral connections . The conductor length should be as
short as possible to ensure the maximum level of protection .
Table 2: Maximum Recommended Conductor Size
Model
JsP-060
1
JsP-080
1
JsP-100
1
JsP-120
2
JsP-160
2
JsP-200
2
JsP-240
2
JsP-300
2
JsP-400
2
1
60 through 100kA units are shipped with #10AWG leads. Leads should be
shortened during installation in order to minimize conductor length.
2
120 through 400kA units are shipped with compression box lugs.
Terminals are identified with markers (Phase A, B, C, Line 1, Line 2,
Neutral or Ground)
if bends are required, they should be sweeping bends (12" radius) . Do not make
sharp 90° bends for appearance purposes because they will severely decrease
the effectiveness of the JsP unit .
Binding or twisting conductors together using tiewraps or electrical tape
increases the protection performance of the device .
ORANGE B
C
A
N
G
SPD
Conductor size
#10AWG
#10AWG
#10AWG
#6AWG
#6AWG
#4AWG
#4AWG
#4AWG
#4AWG
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