© 2020 ASCO Power Technologies. All Rights Reserved
11
IO-70071
01/2020
For access to self-service tools and chat support visit se.com/us/en/work/support or call 1-888-778-2733 for technical assistance
ASCO Model 950 Surge Protective Device (SPD) and Fuse Box
Installation
NOTICE
HAZARD OF PERFORMANCE OPTIMIZATION
• Mount SPD as close to panel or equipment as possible to keep leads short.
• Coordinate the installation and location of Model 950 to include the SPD
and fuse box components.
• Ensure leads are as short and straight as possible (cut excess wire),
including ground by planning the installation that will result in the
shortest possible overall lead length.
Failure to follow these instructions can result in equipment damage.
•
Read all Instructions.
•
All electrical connections should be performed by a qualified electrician
or technician.
•
Meet all National and Local codes.
•
Mount SPD as close to panel or equipment as possible to keep leads
short.
•
Coordinate the installation and location of Model 950 to include the SPD
and fuse box components.
•
Model 950 should be installed as close as possible to the point of
connection with the electrical distribution system.
•
Excessive overall wire length, from the SPD, through the fuse box to the
point of connection with the electrical distribution system will adversely
affect the performance of the SPD.
•
Ensure leads are short and straight as possible (cut excess wire),
including ground by planning the installation that will result in the shortest
possible overall lead length.
•
Unit mounting should be in such a way that the SPD component conduit
hub is facing downward (for weather resistance).
1.
Remove power from panel. Confirm panel is deenergized and locked out.
2. Identify connection, SPD & fuse box locations for shortest leads.
3. Mount SPD and fuse box on a surface capable of supporting 100lbs
(45.4kg) using the hardware and conduit provided along with any other
conduit and fittings as needed, SPD must be mounted with the conduit
hub facing downward.
4. Install in accordance with national and local electrical codes for overcurrent
protection recommendations and wire ampacity considerations.
Note: Use on solidly grounded systems unless the SPD model is
designed for installation on ungrounded/HRG systems.
5. Thread the 3 Phase and 1 Ground conductors from the SPD through
the 6” conduit and the top hub of the fuse box and connect to the Phase
and Ground lugs inside the fuse box, remember to keep the leads as
short as possible.
6. Twist conductors 1/2 turn or more for every twelve inches of length. Do not
loop or coil wires. Be sure to maintain adequate wire bending space per NEC.
7. Thread the 3 Phase and 1 Ground conductors from the bottom of
the fuse box to Phase A, B, C and Ground in the switchgear. Each
conductor from the SPD will be labeled A, B, or C. Connect A, B & C
Phase conductors from the SPD to Phase A, B, & C in the fuse box and
at the point of connection with the electrical system.
8. Label or mark conductors from the fuse box as appropriate.
9. Replace all devices, doors, and covers before turning on power to
the equipment. If the SPD is properly installed and functioning, the
green LED indicators on the display will be lit and the service LED
extinguished.
HAZARD OF ELECTRIC SHOCK, EXPLO-
SION, OR ARC FLASH
• Prior to energizing, verify that the system is
clear of deficiencies.
• Maintain a safe distance from SPD and Fuse
box when power is applied as a precaution
against misapplication.
Failure to follow these instructions will result
in death or serious injury.
DANGER
Figure 2:
Typical Installation (Front View)
Note:
If you have any questions pertaining to the
installation of this device, chat support is available
at se.com/us/en/work/support or call
1-888-778-2733 for technical assistance
