N.J. Admin. Code § 13:20-50B.49

Current through Register Vol. 56, No. 21, November 4, 2024

Section 13:20-50B.49 - Wiring

(a) All wiring shall conform to SAE Recommended Practice J1292 (October 1981), incorporated herein by reference, as amended and supplemented. Multiplex wiring may be used.

(b) Wiring shall be arranged in circuits as required with each circuit protected by a fuse, circuit breaker, or field effect transistor. One extra fuse for each size fuse that is used on the school bus shall be conveniently located in the fuse area unless the school bus is equipped with circuit breakers or field effect transistors. A system of color and number coding shall be used.

1. The following body interconnecting circuits shall be color-coded as follows:

Function	Color
Left Rear Turn Signal Light	Yellow
Right Rear Turn Signal Light	Dark Green
Stoplights	Red
Back-Up Lights	Blue
Taillights	Brown
Ground	White
Iginition Feed, Primary Feed	Black

2. The color of the cables shall conform to SAE Standard J1128 (May 2000), incorporated herein by reference, as amended and supplemented.

3. Wiring shall be arranged in at least six regular circuits as follows:

i. Head, tail, stop (brake), and instrument panel lamps;

ii. Clearance and stepwell lamps (stepwell lamps shall be actuated when the service door is opened);

iii. Dome lamp;

iv. Ignition and emergency door signal;

v. Turn signal lamps; and

vi. Alternately flashing signal warning lamps.

4. Any of the above combination circuits may be subdivided into additional independent circuits.

5. Whenever heaters and defrosters are used, at least one additional circuit shall be installed.

6. Whenever the circuit panel permits, all other electrical functions (such as sanders and electric-type windshield wipers) shall be provided with independent and properly protected circuits.

7. Each body circuit shall be coded by number or letter on a diagram of circuits and shall be attached to the body in a readily accessible location.

(c) The entire electrical system of the school bus body shall be designed for the same voltage as the chassis on which the school bus body is mounted.

(d) All wiring shall have an amperage capacity exceeding the designed load by at least 25 percent. All wiring splices shall be in an accessible location and shall be noted as splices on the wiring diagram.

(e) An easily readable body wiring diagram shall be furnished with each school bus body or affixed in an area convenient to the electrical accessory control panel.

(f) The main power supply to the body shall be attached to a terminal on the chassis.

(g) Wires passing through metal openings shall be protected by a grommet.

(h) Wires not enclosed within the body shall be fastened securely at intervals of not more than 18 inches. All joints shall be soldered or joined by equally effective connectors so that no connectors are exposed.

(i) Buses manufactured in February 2012 or later shall have a heavy-duty solenoid switch or electronic control system in the main electrical power supply line to the body circuits on each Type A, B, C, and D school bus. The solenoid switch shall be energized by the school bus ignition switch. Hazard and turn signal lamp circuits shall operate independently of the ignition switch.

N.J. Admin. Code § 13:20-50B.49

Amended by R.2012 d.023, effective 2/6/2012.
e: 43 N.J.R. 1831(a), 44 N.J.R. 287(b).
In (i), inserted "A,".
Amended by R.2012 d.186, effective 11/5/2012.
See: 44 N.J.R. 1188(a), 44 N.J.R. 2906(c).
In (i), substituted "Buses manufactured in February 2012 or later shall have a" for "A", and deleted "shall be installed" following "system".