5. WIRING (CONTINUED):
TABLE D: TERMINAL WIRE RANGE AND STRIPPING GUIDE
AMPERE
RATING
30
60
100
STRIP LENGTH (INCHES)
TERMINAL WIRE RANGE lAWG)
CONDUCTOR "A"
.63
.63
.63
=�����
Z)l---
�-
�
LINE CONDUCTORS
l><XXXXXXXXXXX)����
::8)1-...
--------
BUILDING WIRE
#8 - #6(CU)
#6 - #2(CU)
#4 - #4/0(CU)
l><XXXXXXXXXXX)�����
�
I
-.
A
-
.
1-
1
-
-
GROUNDING CONDUCTOR
A. Referring to "FIGURE C" feed power supply wiring into Housing 0 through conduit entry.
B. Strip the individual conductors per ''TABLE D".
C. Connect wires to the Line Side Lugs ® of the Disconnect Switch by loosening, but not removing Lug
Screws ®· Insert conductors including all strands into lugs according to your established wiring scheme.
Tighten Lug Screws ® to the appropriate value shown in "TABLE C". Please note the wire markers on the
wires connected between the Receptacle @ and either the Disconnect Switch Load Side Lugs (!) or Fuse
Holder Lugs @. These wire markers correspond to the contact identification markings found on the back of
the receptacle contact block. Refer to "FIGURE B".
D. Fused Switches are equipped with an installed Fuse Holder@ and interlocked Fuse Holder Cover@). The
Cover
can only be opened when the Switch is in the "OFF" position. Attempts to open the
Cover
while the
Switch is "ON" may damage the
Cover.
The purposes of the
Cover
are: personnel safety from shock hazard
of energized electrical parts and to prevent removal of a fuse while Switch is "ON" which could cause an arc
in a potentially explosive atmosphere.
E. For fused units, install appropriate amperage fuses into Fuse Holder@. Use only sand filled, non renewable
Class J Fuses.
F. Wire Guide @ allows wiring to be run from the top or bottom of the Enclosure to the opposite end of the
Enclosure without interference with the Switching Mechanism. Wiring should be held to Wire Guide by the
use of cable ties.
6. ELECTRICAL TESTING:
All wiring must be checked and tested to ensure that all circuits are according to plan and that there are no
unwanted opens, shorts or grounds.
Do not apply power until the following steps are completed:
A. Test to verify correct phasing and ground connections.
B. Test insulation resistance by meggering high voltage or hi-pot test, to be sure the system does not have any
short circuits or unwanted grounds.
7. CLEAN COVER AND HOUSING:
Before closing the Cover @, it is strongly recommended that all dirt, debris and other foreign materials be
removed from the interior.
• This action should be taken to help eliminate the possibility of unwanted shorts or grounds.
• Make sure the cover gasket surface is clean and free of any tears or damage.
• Clean the mating surface of the Housing 0 in the same manner as the Cover @.
8. CLOSE COVER:
A. If the Cover@ was removed, carefully rehang the Cover on the Hinges @ while the Cover is positioned
approximately 90 degrees from the Housing.
B. Close the Cover@. Start the two Housing Cover Bolts G) by hand to prevent cross-threading.
• Tighten the Cover Bolts to 25-30 lb.- ft. torque.
• Do not over-tighten since there is a possibility of stripping threads in the Housing.
9. POWER:
Page 6
With all electrical tests successfully made, the Cover Bolts tightened and the Receptacle turned "OFF",
power may be applied to the "MD2SR" unit.
Rev. C 07/08/04
