Protective Line Devices, Care and Use Flashcards
Common way to perform live-maintenance is with the ?
Rubber gloved method
All other rubber or plastic cover-up equipment is used for the intent of protection against ?
accidental or brush contact
A second point of contact is defined as ?
the point where current leaves the body if contact is made with a hot circuit
All rubber insulating protective equipment must be treated with care, kept clean, and inspected at regular intervals and before each use.
True
In the field, rubber gloves should be given an air test before each use and always used with leather protectors.
True
How should rubber gloves be stored?
rubber gloves should be stored in a canvas bag with the cuffs down to prevent debris from falling into the gloves
OSHA requires Rubber Gloves be tested every ?
6 months
How should Rubber blankets be stored?
Rubber blankets should be inspected for imbedded objects and stored in canvas or PVC containers.
Rubbing line hose should be cleaned ? and inspected for ?
Rubber line hose should also be regularly cleaned and inspected by spreading the line hose open and looking for cuts or evidence of corona damage.
How do you wash Rubber line hoses?
Line hose can be washed with a mild detergent and warm water; avoid using a harsh brush to clean off any contaminant.
Line hose comes in various lengths and in diameters ranging from 1 to 11∕2 inches.
true
How do Line hoses need to be handled?
Line hose should never be laid on the ground or dropped from poles or structures.
Rubber line hose should always be raised and lowered with a hand line and/or canvas bag.
Rubber hoods should receive the same cleaning, inspections, and storage care as line hoses.
True
Voltages as low as 2,400 volts can cause damage to rubber.
True
Most rubber protective equipment used in the electrical industry is made from natural rubber, even though it is not resistant to ozone.
True
What are the two causes to Ozone damage.
misapplication and improper storage
A very small concentration of ozone causes rapid oxidation of rubber.
True
Oil and grease are natural enemies of rubber. If exposed to either, rubber should be cleaned with hot, soapy water. After such an exposure, the gloves should be electrically tested.
True
Line hose or blankets should never be used to insulate one conductor from another.
True
Doubling of rubber goods does not increase their insulating value.
True
Rubber blankets are the only things used to cover insulators.
False
A conductor cover, fabricated from high-dielectric polyethylene, clips on and covers conductors up to ? in diameter.
2”
To prevent tie wires from contacting the crossarm when conductors are being tied or untied, ? are used.
high-dielectric-strength polyethylene crossarm covers
Ozone is created by ? from the oxygen in the air, generally in quite low concentrations, but enough to damage rubber over time.
Sunlight
The highest maximum use voltage for rubber insulating equipment for a phase-to-ground exposure is ? .
36k
