conductors feeding through or tapping off to the other apparatus unless designs are employed that provide adequate space for this purpose.

FPN: See 312.8 for switch and overcurrent-device enclosures.

(B) Wire-Bending Space in Enclosures. Minimum wire- bending space within the enclosures for motor controllers shall be in accordance with Table 430.10(B) where measured in a straight line from the end of the lug or wire connector (in the direction the wire leaves the terminal) to the wall or barrier. Where alternate wire termination means are substituted for that supplied by the manufacturer of the controller, they shall be of a type identified by the manu-

facturer for use with the controller and shall not reduce the minimum wire-bending space.

430.11 Protection Against Liquids. Suitable guards or en closures shall be provided to protect exposed current- carrying parts of motors and the insulation of motor leads where in-

Table 430.10(B) Minimum Wire-Bending Space at the
Terminals of Enclosed Motor Controllers
Wires per Terminal*
Size of -------------------------------------------- Wire 1 2
(AWG or -------------------------- ---------------

kcmil) mm in. mm in.

14-10 Not specified — —

8-6 38 l'/2 — —

4-3 50 2 — —

2 65 2'/2 — —

1 75 3 — —

1/0 125 5 125 5

2/0 150 6 150 6

3/0-4/0 175 7 175 7

250 200 8 200 8

300 250 10 250 10

350-500 300 12 300 12

600-700 350 14 400 16

750-900 450 18 475 19

"Where provision for three or more wires per terminal exists, the minimum wire-bending space shall be in accordance with the require- ments of Article 312.

stalled directly under equipment, or in other locations where dripping or spraying oil, water, or other liquid may occur, unless the motor is designed for the existing conditions.
430.12 Motor Terminal Housings.
(A) Material. Where motors are provided with terminal housings, the housings shall be of metal and of substantial construction.

Exception: In other than hazardous (classified) locations, substantial, nonmetallic, nonbuming housings shall be permitted, provided an internal grounding means between the motor frame and the equipment grounding connection is incorporated within the housing.

(B) Dimensions and Space — Wire-to-Wire Connec- tions. Where these terminal housings enclose wire-to- wire connections, they shall have minimum dimensions and usable volumes in accordance with Table

430.12(B).

(C) Dimensions and Space — Fixed Terminal Connec- tions. Where these terminal housings enclose rigidly mounted motor terminals, the terminal housing shall be

of sufficient size to provide minimum terminal spacings and usable volumes in accordance with Table
430.12(C)(1) and Table 430.12(C)(2).
Table 430.12(B) Terminal Housings — Wire-to-Wire
Connections
Motors 275 mm (11 in.) in Diameter or Less

Cover Opening

Minimum Dimension

Usable Volume

Minimum

Horsepower mm in. cm 3 in.3

Motors Over 275 mm (11 in.) in Diameter — Alternating-Current Motors
Table 430.12(B) Continued
Table 430.12(C)(2) Usable Volumes — Fixed Terminals

Maximum

Direct-Current Motors

Power-Supply
Minimum Usable Volume per