Engineering Data
Minimum Wire Bending Space
Minimum wire bending space at terminals and minimum width of wiring gutters
NEC Table 312.6(A)
AWG OR
CIRCULAR-MIL
SIZE OF WIRE
14–10
8–6
4–3
2
1
1/0–2/0
3/0–4/0
250 kcmil
300–350 kcmil
400–500 kcmil
600–700 kcmil
750–900 kcmil
1000–1250 kcmil
1500–2000 kcmil
1
MM
WIRES PER TERMINAL
3
MM
IN.
–
–
–
–
–
–
–
–
–
–
–
–
–
–
203
8
203
8
254
10
254
10
305
12
356
14
–
–
2
IN.
Not specified
38.1
1 1⁄ 2
50.8
2
63.5
2 1⁄ 2
76.2
3
88.9
3 1⁄ 2
102
4
114
4 1⁄ 2
127
5
152
6
203
8
203
8
254
10
305
12
MM
IN.
–
–
–
–
–
–
127
152
152
203
203
254
305
–
–
–
–
–
–
–
5
6
6
8
8
10
12
–
4
5
MM
IN.
MM
IN.
–
–
–
–
–
–
–
–
254
305
305
356
406
–
–
–
–
–
–
–
–
–
10
12
12
14
16
–
–
–
–
–
–
–
–
–
–
–
456
406
457
–
–
–
–
–
–
–
–
–
–
–
14
16
18
–
Bending space at terminals shall be measured in a straight line from the end of the lug or wire connector (in the direction that the wire leaves the terminal)
to the wall, barrier or obstruction.
Minimum wire bending space at terminals
NEC Table 312.6(B)
Engineering Data
WIRE SIZE (AWG OR KCMIL)
COMPACT STRANDED
ALL OTHER
AA-8000 ALUMINUM
CONDUCTORS
ALLOY CONDUCTORS
(SEE NOTE 3.)
12
14–10
8
6
4
3
2
1
1/0
2/0
3/0
4/0
250
300
350
400
500
600
700
750
800
900
1000
1250
1500
1750
2000
12-8
6
4
2
1
1/0
2/0
3/0
4/0
250
300
350
400
500
600
700-750
800-900
1000
–
–
–
–
–
–
–
–
WIRES PER TERMINAL
2
1
MM
IN.
Not Specified
38.1
11⁄ 2
50.8
2
76.2
3
76.2
3
88.9
31⁄ 2
114
41⁄ 2
140
51⁄ 2
152
6
165a
61⁄ 2a
178b
7b
216d
81⁄ 2d
254e
10e
305e
12e
330e
13e
356e
14e
381e
15e
406e
16e
432e
17e
457
18
483
19
508
20
559
22
610
24
610
24
610
24
3
4 OR MORE
MM
IN.
MM
IN.
MM
IN.
–
–
–
–
–
–
–
140
152
165a
190c
229b
254d
305e
330e
356e
406e
457e
483e
508
559
–
–
–
–
–
–
–
–
–
–
–
–
51⁄ 2
6
61⁄ 2a
71⁄ 2c
81⁄ 2b
10d
12e
13e
14e
16e
18e
19e
20
22
–
–
–
–
–
–
–
–
–
–
–
–
178
190
203
216a
254b
279b
330e
356e
381e
457e
508e
559e
559
610
–
–
–
–
–
–
–
–
–
–
–
–
7
71⁄ 2
8
81⁄ 2a
9b
11b
13 e
14e
15e
18e
20e
22e
22
24
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
254
305
356d
381e
406e
483e
559e
610e
610
610
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
10
12
14d
15e
16e
19e
22e
24e
24
24
–
–
–
–
–
1. Bending space at terminals shall be measured in a straight line from the end of the lug or wire connector in a direction perpendicular to the enclosure wall.
2. For removable and lay-in wire terminals intended for only one wire, bending space shall be permitted to be reduced by the following number of millimeters (inches) :
a 12.7mm (1/2 in.)
b 25.4mm (1 in.)
c 38.1mm (11/2 in.)
d 50.8mm (2 in.)
e 76.2mm (3 in.)
3. This column shall be permitted to determine the required wire-bending space for compact stranded aluminum conductors in sizes up to 1000 kcmil and
manufactured using AA-8000 series electrical grade aluminum alloy conductor material in accordance with 310.14.
182
Data subject to change without notice.