A schools

Question 1

Undivided Attention

Answer 1

when used in the context of supervision undivided attention requires sole focus of the individual providing supervision to the individual/s performing work including complete visual and audible dedication to the individual

Question 2

second point of contact

Answer 2

any conductive object providing an exit path for electrical current if the worker comes into contact with a source of electrical energy. second point of contact could include, for example, earth ground, ground wire, grounded equipment, conductors at a different potential, pole hardware, trees, poles and so forth.

Question 3

should

Answer 3

recommended

Question 4

must or shall

Answer 4

mandatory

Question 5

hazard

Answer 5

an unsafe action or unsafe condition that may lead to injury of persons, or damage to property.

Question 6

bonded/bonding

Answer 6

electrically connecting conductive objects to ensure they are at, and remain at the same electrical potential.

Question 7

de-energized

Answer 7

disconnected from all energy sources. when applied to electrical lines and equipment shall mean disconnected from all external sources of electrical energy by means of an energy isolation device but does not mean visual isolation, grounding, or placing of protective cards.

Question 8

isolated

Answer 8

disconnected from all external sources of hazardous electrical or mechanical energy (not to be confused with cleared)

Question 9

switching

Answer 9

any function that changes the operating status of equipment or circuits.

Question 10

personal protective equipment (ppe)

Answer 10

any equipment or device intended to be worn or used to prevent or minimize personal injury or ill health.

Question 11

equipotential bonding

Answer 11

electrically connecting all conductive objects in a zone surrounding a worker to ensure that all objects and workers in the zone are, and remain at the same electrical potential, regardless of the relationship to earth potential. to achieve this purpose the bonding connection must be of sufficient capacity to safely conduct any current likely to be imposed on it.

Question 12

equipotential grounding

Answer 12

an equipotential bonding zone connected to an earth ground.

Question 13

conductor

Answer 13

any line, wire, underground cable, bus, apparatus, equipment or material capable of transmitting electrical energy.

Question 14

qualified

Answer 14

accepted as competent in reference to certification, licensing, training and education, experience, personal competence, physical fitness and familiarity with established safe work procedures, life saving rules and hazards involved.

Question 15

indirect supervision

Answer 15

a qualified person giving direction to an employee(s) while remaining in the general work area with an established communication plan.

Question 16

clearance

Answer 16

a general term used to describe the accomplished procedure of de-energizing electrical lines and equipment or immobilizing mechanical equipment and applying lockout to permit hands on work. clearance includes the placing of protective cards as specified in this book. for high voltage it involves isolating workers from all sources of energy which may be hazardous to the worker including the draining of trapped electrical or mechanical energy which may have been retained or built up. for high voltage this means that all possible energizing points are open with visual isolation. for high voltage the clearance shall be issued by the operating authority in terms of clearance to place temporary protective grounds as required. note: for distribution systems the person in charge of switching is the operating authority.

Question 17

direct supervision

Answer 17

a qualified person giving his/her undivided attention to an employee(s) working on or near energized lines, equipment or at any hazardous location. he/she must remain at the specific location where the task being carried out and shall not perform work on any part of the job except that being performed by the worker. the person giving direct supervision must be equipped with the necessary tools and safety equipment to render assistance if required or shall have someone on location who is qualified and equipped to give such assistance.

Question 18

work

Answer 18

any construction, operation, maintenance, repair or other activity performed in the course of employment.

Question 19

employee

Answer 19

any person directly employed by manitoba hydro.

Question 20

low voltage

Answer 20

consistent with MR 217/2006, is defined as voltages between 31 and 750 volts AC or DC.

Question 21

supervisor

Answer 21

the person in immediate charge of the work or work crews regardless of normal title or classification and includes foreman, charge hands, leads, person in charge, etc.

Question 22

emergency

Answer 22

an abnormal situation which requires prompt action beyond normal procedures to limit damage to persons, property or the environment.

Question 23

high voltage

Answer 23

any line or apparatus energized at or above 750 volts AC or DC.

Question 24

limits of approach

Answer 24

the air gap that is required between live uninsulated conductors or apparatus and any part of the workers body, material or tools being handled or equipment etc. that is at a different potential.

Question 25

approved

Answer 25

acceptable to manitoba hydro standards.

Question 26

live or energized

Answer 26

these terms have identical meanings in the electrical sense. they mean connected to a source of electrical energy.

Question 27

on location supervision

Answer 27

a qualified person supervising an employee(s) while remaining on location (communication distance, visible and audible). he/she must be equipped with the necessary tools and safety equipment to render assistance if required or shall have someone on location that is qualified and equipped to give such assistance.

Question 28

backfeed

Answer 28

a low voltage source (eg. generator) which can energize the low voltage secondary windings of a transformer and which then feeds primary voltage back onto our system.

Question 29

hold card

Answer 29

used to prevent unauthorized operation. equipment or device shall not be used/operated until the person for whom the card was placed authorizes its removal.

Question 30

caution card

Answer 30

provides a safety hold off in case of trip-out. if trip-out occurs, line cannot be re-energized until assurance has been received from the safety hold off issuer that it is safe to do so.

Question 31

hot ground

Answer 31

any ground connected only to the h2 of transformer and not a ground rod or system neutral. multiple connections to the system neutral or pole grounds prevent this

Question 32

Temporary Protective Grounds or TPGs

Answer 32

approved conductive devices of sufficient current carrying capacity designed to connect a ground source to de-energized conductors and electrical apparatus to carry any source or electrical energy to the ground source. temporary protective grounds are placed to create a low resistance path to ground on an isolated circuit in the event of accidental energization they cause the circuit protection device to trip which limits the duration of fault current flow.

Question 33

Ground or Grounded

Answer 33

an approved, uninterrupted conductive connection, between electrical conductors or equipment and the earth. the connection must be of sufficiently low resistance and of adequate current carrying capacity to achieve its purpose.

Question 34

voltage

Answer 34

a measure of electrical potential. All “high voltage” herein is quoted in terms of phase to phase voltage. All “low voltage” herein is quoted in terms of phase to ground voltage.

Question 35

person in charge

Answer 35

the designated, qualified person responsible for overseeing the work at a specific location regardless of normal title or classification. for every day work group, including those working under the direction of a multi-crew job coordinator, there must always be a designated “person in charge”