1. (a) Battery.

   1. (1)

      1. (A) The standard on all Type B, Type C, and Type D diesel units will be a minimum of one thousand nine hundred cold cranking amps (1,900 CCA) at zero degrees Fahrenheit (0˚ F).
      2. (B) Optional equipment, when specified, will be one (1) battery with a minimum of eight hundred fifty cold-cranking amps (850 CCA).
      3. (C) Higher capacities may be required depending upon:

2. (i) Optional equipment; and

   1. (ii) Local environmental conditions.

   2. (2)

      1. (A) All batteries in Type B, Type C, and Type D buses are to be located in a sliding tray.
      2. (B) Type A chassis with the battery outside the engine compartment shall have a sliding tray installed.

   3. (3)

      1. (A) The body manufacturer shall securely attach the battery on a slide-out tray or door in a closed, vented compartment in the body skirt, so that the battery is accessible for convenient servicing from the outside.

      2. (B) Battery compartment door or cover shall be:

         1. (i) Hinged at the front or top; and
         2. (ii) Secured by an adequate and conveniently operated latch or other type fastener.

3. (b) Alternator.

   1. (1)

      1. (A) All Type A and Type B buses with a GVWR of fifteen thousand pounds (15,000 lbs.) or less shall have a minimum one hundred thirty-ampere (130 amp) alternator.
      2. (B) Buses equipped with an electrically powered wheelchair lift and/or air conditioning shall be equipped with the highest rated capacity available from the chassis OEM.

   2. (2)

      1. (A) Type B, Type C, and Type D buses shall be equipped with a heavy duty truck, bus type, or pad mount alternator meeting SAE International J 180.
      2. (B) Having a minimum output rating of two hundred amperes (200 amp.), the alternator shall be capable of producing a minimum of fifty percent (50%) of its maximum rated output at the engine manufacturer's recommended idle speed.
      3. (C) The minimum alternator output for the air conditioning system is two hundred amperes (200 amp) minimum.
      4. (D) With a combination of air conditioner and/or lift a minimum alternator output of two hundred seventy amperes (270 amp).

   3. (3)

      1. (A) Direct-drive alternator is permissible in lieu of belt drive.

      2. (B) Belt drive shall be capable of handling the rating capacity of the alternator with no detrimental effect on other driven components.

         1. (c) Electrical wires and terminals (body and chassis).

   4. (1)

      1. (A) All wiring shall comply with latest SAE International recommended practices.

      2. (B) This shall include:

         1. (i) SAE International J541a;
         2. (ii) SAE International J1127;
         3. (iii) SAE International J1708; and
         4. (iv) SAE International J1128.

   5. (2) Wiring shall be of sufficient size to carry the required load without excessive voltage drop.

      1. (d)
   6. (1) Wires shall be permanently continuous color coded or permanently number coded to easily identify the various circuits.
   7. (2) Use of taped numbers is not acceptable.

4. (e)

   1. (1) Wires shall be of sufficient length to provide a loop at terminals so as to permit ample slack for directional positioning.
   2. (2) The length shall allow replacement of end terminals twice, without pulling, stretching, or replacing the wire.

5. (f)

   1. (1) Corrosion-resistant full-ring or interlocking terminals shall be used for terminating wire ends at components.
   2. (2) All wires shall be continuous and terminate at appropriate connector.
   3. (3) "T" or butt connectors shall not be used.
   4. (4) Vehicles multiplex wiring system shall be to manufacturer standards.
6. (g) Battery cable terminals, component terminals, and connectors exposed to the ambient shall be coated with a terminal corrosion preventive compound.

7. (h)

   1. (1) Except for those on large wires, such as battery cables, terminals shall be machine crimped to the wiring.

   2. (2) A ratchet-type hand crimper may be used where it is not possible to use a large machine crimper.

      1. (i)

      2. (A) Wiring shall be arranged in circuits as required and each circuit protected by a:

         1. (i) Fuse;
         2. (ii) Field effect transistor (FET); or
         3. (iii) Circuit breaker.
      3. (B) A system of colors and numbers shall be used, and an appropriate identifying wiring diagram of each body as manufactured shall be provided to the end user.
8. (j) A daytime running lamp system meeting chassis manufacturer’s specifications shall be provided.

Codification Notes: “GVWR” means gross vehicle weight rating. "OEM" means original equipment manufacturer.