Basic HTML Version
Electrical protection and safety
Material requirements
Copper
Aluminium
Type of
conductor
Parameter SI
US
SI
US
Air
terminal, solid
- Diameter
9,5 mm
in
12,7 mm in
Air
terminal,
tubular
- Diameter
- Wall
thickness
15,9 mm
0,8 mm
in
0,033 in
15,9 mm
1,63 mm
in
0,064 in
Main
conductor,
cable
- Size each
strand
- Weight per
length
- Cross
section area
275 g/ m
29 mm
2
17 AWG
187 lb/
1 000 ft
57 400
cir mils
141 g/m
50 mm
2
14 AWG
95 lb/ 1
000 ft
98 600
cir mils
Bonding
conductor,
cable (solid or
stranded)
- Size each
strand
- Cross
section area
17 AWG
26 240
cir mils
14 AWG
41 100
cir mils
Bonding
conductor,
solid strip
- Thickness
- Width
1,30 mm
12,7 mm
0,051 in
in
1,63 mm
12,7 mm
0,064 in
in
Main
conductor,
solid strip
- Thickness
- Cross
section area
1,30 mm
29 mm
2
0,051 in
57 400
cir mils
1,63 mm
50 mm
2
0,064 in
98 600
cir mil
Table 6: Ordinary structures not exceeding 23 m (75 ft) in height shall
be protected with Class I materials.
Copper
Aluminium
Type of
conductor
Parameter SI
US
SI
US
Air terminal,
solid
Diameter
12,7 mm in
15,9
mm
in
Main
conductor,
cable
- Size each
strand
- Weight per
length
- Cross
section area
558 g/m
58 mm
2
15 AWG
375 lb/
1 000 ft
115 000
cir mils
283 g/m
97 mm
2
13 AWG
190 lb/ 1
000 ft
192 000
cir mils
Bonding
conductor,
cable
(solid or
stranded)
- Size each
strand
- Cross
section area
17 AWG
26 240
cir mils
14 AWG
41 100
cir mils
Bonding
conductor,
solid strip
- Thickness
- Width
1,30 mm
12,7 mm
0,051 in
in
1,63
mm
12,7
mm
0,064 in
in
Main
conductor,
solid strip
- Thickness
- Cross
section area
1,63 mm
58 mm
2
0,064 in
115 000
cir mils
2,61
mm
97 mm
2
0,1026 in
192 000
cir mils
Table 7: Ordinary structures exceeding 23 m (75 ft) in height shall be
protected with Class II materials.
1
2
3
8
1
2
1
2
5
8
1
2
1
2
1
2
5
8
5
8