Upstream Overcurrent Protection Device - Joslyn JSP Series Installation, Operation And Maintenance Manual

JOSLYN JSP , JSPR INSTALLATION, OPERATION AND MAINTENANCE MANUAL
® TM
Conductor Sizing & Routing
(JSP)
Upstream Overcurrent
Protection Device
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
JSP Models
JSP-120
JSP-160
JSP-200
JSP-240
JSP-300
JSP-400
• 60 through 100kA units are shipped with #10AWG leads. Leads should be
shortened during installation in order to minimize conductor length.
• 120 through 400kA units are shipped with compression box lugs.
The set screws on the box lugs should be torqued to 20 in-lbs.
• Terminals are identified with markers (Phase A, B, C, Line 1, Line 2,
Neutral or Ground)
The JSP Series unit is a Type 1 SPD which is suitable for use in both Type 1
and Type 2 SPD applications . The JSP Series unit is a one-port SPD and is
to be connected in parallel with the electrical system . It may be connected
via a circuit breaker, molded case switch, fused switch, or connected directly
to the bus of the panelboard or switchboard it is protecting . If direct bus
connection is used, Joslyn recommends installing the JSP Series unit behind
®
a disconnect switch or other disconnecting means for ease of serviceability .
If the SPD is connected to a dedicated OCPD, a 60A breaker is recommended
(30A minimum, 200A maximum) .
Conductor size
#6AWG
#6AWG
#4AWG
#4AWG
#4AWG
#4AWG
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