(OLD) Ch 9 - Bonding And Grounding

Question 0

9–2 safety

Results of disturbances =

Answer 0

Death or injury

Question 1

9–2 safety

Primary responsibility =

Answer 1

Safeguarding personnel, property

Question 2

9–2 safety

Best time to design =

Answer 2

Initial planning and construction phases

Question 3

9–4 background

Bonding =

Answer 3

Between two metallic items

Question 4

9–6 ITS consideration

New construction =

Answer 4

Electrical contractor must provide means of access

Question 5

9–6 ITS consideration

Disconnect =

Answer 5

Qualified electrical maintenance person

Question 6

9–9 measuring the equipment grounding conductor impedance

Equipment grounding conductor can only be accurately measured =

Answer 6

Ground impedance tester

Question 7

9–10 isolated ground (IG)

IG type receptacle =

Answer 7

Orange triangle

Question 8

9–10 IG

IG systems =

Answer 8

Not recommended

Question 9

9–10 signal reference grid (SRG)

SRG =

Answer 9

Grounding and bonding for raised floors

Question 10

9–12 telecom bonding infrastructure

Bonding overall purpose =

Answer 10

Equalize potentials

Question 11

9–12 telecom bonding infrastructure

ANSI J-STD-607A =

Answer 11

Commercial building GROUNDING AND BONDING requirements for telecom

Question 12

9–16 entrance facility (EF)

EF =

Answer 12

TMGB

Question 13

9–16 EF

TMGB =
3

Answer 13

• Telecommunications main grounding
• 0.25in x 4in
• located as near as possible to cable EF

Question 14

9–16 EF

BCT =
4

Answer 14

• Bonding conductor
• 6 AWG
• 30ft
• AC panel

Question 15

9–17 EF

BCT two alternatives =

Answer 15

• Structural steel

* conductor between it TMGB and AC branch circuit panel board

Question 16

9–18 equipment room (ER)

TGB =

Answer 16

• Telecommunications grounding bar

* 0.25in x 2in

Question 17

9–19 TR

TBB =
3

Answer 17

• Telecommunications bonding backbone
• costly to achieve
• Long length

Question 18

9–20 sizing bonding conductor

6AWG =

Answer 18

Does not exceed 100 feet

Question 19

9–23 bonding connections

Bonding typical connections =
2

Answer 19

• Compression

* exothermic welding

Question 20

9–24 bonding connection inspection

Visual inspection =

Answer 20

Except impedance (does not belong)

Question 21

9–26 lightning exposure

Lightning exposure =
3

Answer 21

• Circuits in large metropolitan
• 140ft
• 5 or fewer thunderstorm days per year

Question 22

9–28 lightning exposure

Direct buried cable collects =

Answer 22

• Ground strikes

* 6.5ft to 20ft

Question 23

9–31 standards

ANSI J/STD-{670-A}

Answer 23

Bonding and grounding (earthing) commercial bldgs

Question 24

9–31 standards

ANSI/TIA/EIA-{568-B.1-2}

Answer 24

Grounding and bonding for horizontal cabling

Question 25

9–31 standards

IEEE 1100 =

Answer 25

Powering and grounding electronic equipment

covers sensitive systems

Question 26

9–32 standards

LPI =

Answer 26

NFPA 780

Question 27

9–32 standards

NFPA 70 =

Answer 27

Publishes and NFPA 70 ~ NEC

Question 28

9–32 standards

NFPA 780 =

Answer 28

Standard lightning protection