10
S&C Instruction Sheet 662-510
Enclosure Doors
DANGER
When access to high-voltage compartments is
required for inspection, service, or repairs, always
observe the precautions below.
Failure to observe
these precautions may result in serious personal
injury or death.
1. Access to pad-mount gear must be restricted only
to qualified persons. See the “Qualified Persons”
section on page 2.
2. Always follow safe operating procedures and rules.
3. Before touching any device, always disconnect
switches and fuses from all power sources
(including backfeed), test for voltage, and properly
ground.
4. Always assume both sets of power terminals on
any switch or fuse are energized unless proved
otherwise by test, by visual evidence of open-
circuit conditions on both sets of terminals, or by
observing that both sets of terminals are grounded.
5. Test for voltage on both sets of power terminals of
any switch or fuse using proper high-voltage test
equipment.
6. After the gear has been completely disconnected
from all sources of power and tested for
voltage, install suitable grounding cables in all
compartments.
7. Make sure the enclosure is properly grounded to
the station or facility ground. Do not return
equipment to service unless such grounds are
properly made.
Opening and Closing the Doors
Complete the following steps to open the doors:
STEP 1.
To access a side of the enclosure, remove the
padlock from the doors.
STEP 2.
Insert a pentahead socket wrench or tool
(a hexhead socket wrench or tool when catalog
number suffi x “-B1” or “-B2” is specifi ed) into the
latching mechanism. Rotate the wrench or tool
60° counterclockwise to unlatch the doors.
See Figure 3.
NOTICE
Do not apply any undue force when attempting to
open the doors. The use of undue force may damage
the latching mechanism.
STEP 3.
Disengage the left-door latching mechanism by
turning the latch clockwise. See Figure 4.
STEP 4.
Open each door fully and latch the door holders.
See Figure 5.
STEP 5.
To gain access to the other side of the enclosure,
repeat Steps 1 through 4 to open the doors.
Figure 3. To unlock the doors, turn the pentahead socket wrench
60° counterclockwise against spring resistance until a “click”
is heard and the wrench reaches its stop.
Figure 4. The left-door latching mechanism disengaged.
Door-latching
mechanism
disengaged
Figure 5. Using the door holder to hold the door open.
Door holder (stored)
Door holder (latched)
(a)
(b)
