UFC 3-535-01
17 November 2005
Table 14-8. Checklist for Vault (Cont., 4 of 4)
____ 3. Are the cables identified in all handholes, manholes and wireways?
____ 4. Are cables in manholes mounted on non-metallic racks and properly secured? Are
cables neatly organized and secured in hanholes if racks are not used?
____ 5. Are cable racks and manhole/handhole frame and covers properly grounded?
____ 6. Do ducts terminating in manholes and handholes have end bells, and is duct
penetration properly grouted, plugged or sealed?
____ 7. Has backfilling and compaction been properly done (no trench settlement), and are
disturbed areas properly restored?
____ 8. Is sufficient cable slack provided at each primary connector termination?
____ 9. Does the cable insulation meet the minimum resistance requirements?
14-4
CABLE, CONNECTOR, AND ISOLATION TRANSFORMER
INSPECTION
The primary and secondary cable leads of the transformers are supplied with factory-
installed molded connectors. Visual inspection of these items during installation is very
important. Minor cuts, bruises, or mishandling may result in a progressive deterioration
which will eventually cause complete failure, but not until some time after acceptance
tests. During installation, the following items must be inspected (see also checklist
Table 14-7):
14-4.1
Connectors
The mating surfaces of molded connectors are to be clean and dry when plugged
together. If clean and dry inside, these high voltage connectors, with taping, form a
connection equal or superior to a conventional high voltage splice. Conversely, if they
are wet or dirty inside, taping will not produce a satisfactory connection. Two or three
turns of tape, or heat shrink tubing, should be used to hold the connector together and
keep the parting line clean. Cleanliness of mating surfaces can be ensured by keeping
the factory-installed caps in place until the final connection is made. The mating
surfaces of uncapped connectors should not be laid down, touched, or breathed upon. If
a connection must be broken the connectors should be immediately capped.
14-4.1.1. The connectors are to be completely plugged together. After initial plugging,
trapped air pressure may partially separate the plug and receptacle. If this happens,
wait a few seconds and push them together again. Two or three turns of tape should be
used to hold them in place.
14-4.2
Cables
14-4.2.1
The cables are not to be cut by shovels, nicked, crushed by vehicle
wheels, bruised by rocks, or damaged in any way during handling and installation.
14-4.2.2
The cables are to be buried to the specified depth below finished grade,
and all other detailed requirements of the installation specification must be met.
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