Ch. 9 * (Bonding & Grounding) Flashcards
1
Q
Safeguard against ___ due to electrical shock
A
Death or injury
2
Q
Device used to test the impedance of the equipment grounding conductor
A
Ground impedance tester
3
Q
Ground every ___ floor pedestal
A
4th
4
Q
Commercial building grounding and bonding standard
A
607-A
5
Q
TMGB
A
Telecommunications Main Grounding Busbar
6
Q
Minimum dimension of TMGB
A
.25” X 4”
7
Q
Ground wire
A
6 AWG
8
Q
BCT
A
30’
9
Q
Bonding in the EF
A
Not cold water pipe
10
Q
TGB dimensions
A
.25” X 2”
11
Q
Consider the TBB for a large site may be ___
A
Costly to achieve
12
Q
Typical bonding connections
A
Compression-type
Exothermic welding
Clamps
13
Q
Visual inspection
A
Loose connections Corrosion Physical damage System modifications Except "impedance"
14
Q
Direct-buried cable collects ground strikes within a distance of ___
A
6.5’ - 20’ determined by soil resistance
15
Q
Lightning Protection Institute
A
Based on NFPA 780
