1 . 1 Guide.
I n s p e c t i o n schedules are necessary for all equipment items
r e q u i r i n g periodic inspections. T o determine the frequency of inspection, ask
t h e following questions:
W i l l t h e f a i l u r e o f t h i s t e r n interfere with an essential operation?
time for replacement?
Does the item have a high cost or a long lead
W i l l failure endanger life and/or property?
W i l l failure of this item result in high energy losses and costs?
If all of these questions are answered YES, the item must have frequent
If the answer to the questions are a combination of YES and NO,
I f the answer to all the questions are
l e s s frequent inspection is required.
NO, l i t t l e o r n o i n s p e c t i o n i s r e q u i r e d .
1 . 2 Basis of Frequency. C o n s u l t manufacturers' publications, operating
d i v i s i o n personnel, and the other chapters of this manual when establishing
Frequency may be established on a calendar basis such
i n s p e c t i o n frequencies.
a s monthly, quarterly, or semiannually. On a seasonal basis such as after
e v e r y 1.000 hours of operation.
1.3 Maximum Frequency. Inspection of items should not be scheduled more
f r e q u e n t l y than required to assure normal operating efficiency. Most items
s h o u l d be-inspected at least once a year.E x c e p t i o n s to the requirement for
a n n u a l inspection may be made for direct buried distribution systems, storage
s y s t e m s , high towers and similar items where it is operationally impracticable
o r unfeasible to make internal or external inspection, or where personnel
p e r f o r m i n g the inspection would be subject to great personal hazard.
1.4 Replacement of Parts upon Breakdown. On certain t y p e s o f l o w - c o s t o r
i n a c c e s s i b l e items, replacement of the item at the time of breakdown may be
m o r e economical than periodic inspections.
1 . 5 Adjustment in Frequency. O c c a s i o n a l l y few deficiencies are found during
the scheduled inspection of some items. When this occurs consider less
f r e q u e n t inspections. Or when the same deficiency is reported after each
i n s p e c t i o n of a particular item, inspect more frequently. Determine the
frequency of inspection so that emergency calls and service work are kept to a
2. TIME ESTIMATES. The time normally required to make a careful examination
o f an item depends on the following considerations:
Tools or equipment the inspector may need