Term
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Definition
| provide a better path to ground so that flow of fault current will bypass a lineworker |
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Term
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Definition
| minimize the time and limit the amount of current flow and voltage drop across the lineworker's body |
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Term
if its not grounded its not dead
not dead unless grounded |
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Definition
| number one saying in grounding |
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Term
| 1-5 milliamperes or .1% to .5% of 1 amp |
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Definition
| detectable amount of amperage |
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Term
| 9-15 milliamperes or .9% to 1.5% of 1 amp |
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Definition
| painful amount of amperage |
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Term
| 16 - 100 milliamperes or 1.6% to 10% of 1 amp |
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Definition
| let go amount of amperage |
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Term
| 100-700 milliamperes or 10% to 70% of 1 amp |
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Definition
| ventricular fibrillation of the heart amount of amperage |
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Term
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Definition
| amount of amps that will burn skin and organs |
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Term
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Definition
| provides low resistance, short circuited connection, from line to earth at key locations on one or both sides of work site |
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Term
| equipotential grounding EPZ |
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Definition
| provides low resistance, short circuited connected from line to earth and shunts or diverts the flow of current around the lineworker |
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Term
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Definition
| most effective grounding method of protecting lineworker |
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Term
| induced voltage or induction |
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Definition
| produced by adjacent energized lines (lines close to one another) |
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Term
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Definition
| no protection from _________ |
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Term
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Definition
| most commonly encountered with line capacitors and underground cables. Can store electricity and retain a charge for some time after being deenergized |
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Term
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Definition
result of air moving across conductors.
warmer winds blowing across surface conductors |
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Term
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Definition
| lines that are re-energized accidentally by nature or people |
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Term
accidentally operating switch, breaker, disconnect etc.
switches accidentally falling closed
generator backfeed
line contacts from foreign objects |
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Definition
| how can lines be inadvertently energized |
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Term
| creates better path for electricity to bypass lineworker |
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Definition
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Term
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Definition
| amount of current that a given system can deliver to a short circuit or fault |
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Term
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Definition
| levels of fault current can be how much |
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Term
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Definition
| minimal required size for ground wire |
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Term
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Definition
| difference of potential between workers feet |
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Term
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Definition
| difference of potential between workers hands and feet |
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Term
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Definition
| grid in substation designed to handle any fault current |
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Term
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Definition
runs entire length of the circuit on 4 wire systems.
Provides solid path from the supply transformer to end of the line |
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Term
| grounded 4 times per mile |
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Definition
| required amount system neutral need to be grounded |
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Term
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Definition
| grounded wire designed to protect transmission lines from lightning |
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Term
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Definition
| 5/8 or 3/4 inch ground rod that is driven into earth deep as practical. provides many paths for flow of current |
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Term
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Definition
| why are metal structures good ground sources |
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Term
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Definition
| type of voltage testing that has a mass of metal that is touched and pulled away from conductor; not considered as reliable because you have to listen for a buzzing sound |
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Term
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Definition
| voltage testing instrument that has audio and visual cues that indicate the presence of voltage |
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Term
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Definition
true or false
ground cable length should be short as possible to minimize whipping effect |
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Term
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Definition
| grounding equipment that contacts pole to establish equipotential zone |
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Term
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Definition
| type if voltage tester that glows in presence of voltage |
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Term
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Definition
| grounding used to protect lineworkers on the ground when stringing conducors |
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Term
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Definition
| grounds used to bleed off induction on static when stringing conductors |
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Term
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Definition
underground testing component that provides a contact point for testing when inserted into a bushing.
Not fault rated; or a to be used for grounding |
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Term
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Definition
| used to isolate, test and ground an underground cable or circuit |
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Term
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Definition
| used on 20 amp bushing to ground underground conductors or devices |
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Term
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Definition
| temporary ground for elbows; used to bleed off capacitance |
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Term
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Definition
| used to cover vacated bushings. insulates shields and seals any load break bushing interface |
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Term
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Definition
| have exposed clamps similar to overhead grounds |
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Term
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Definition
| used to prove cable is de-energized at work location |
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Term
| disconnect grounding clamp |
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Definition
| used to ground risers that are terminated at the bottom of the disconnect |
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