Posted on by

N14 Base Engine Troubleshooting and Repair Manual – 018-021   Electrical System

Table of Contents

Specifications

Specifications

 TOC

Minimum Recommended Battery Capacity (Automotive and Industrial)

Battery Capacity
  Ambient Temperatures
  -18°C [0°F] 0°C [32°F]
System Voltage Cold Cranking Amperes Reserve Capacity(1) Amperes Cold Cranking Amperes Reserve Capacity(1) Amperes
12 VDC 1800 640 1280 480
24 VDC(2) 900 320 640 240
(1) The number of plates within a given battery size determines reserve capacity. Reserve capacity determines the length of time which sustained cranking can occur.
(2) CCA ratings are based on two 12 VDC batteries in series.

A minimum of 6 VDC at the 3-pin power connector is required to power up the ECM on CELECT™ Plus engines.

Specific Gravity at 27°C [80°F] State of Charge
1.260 to 1.280 100%
1.230 to 1.250 75%
1.200 to 1.220 50%
1.170 to 1.190 25%
1.110 to 1.130 Discharged


Maximum Resistance of Starting Motor Circuit:

  • 12-VDC starting motor (ohms) 0.00075
  • 24-VDC starting motor (ohms) 0.002

Cable resistances can be obtained in accompanying battery cable resistance chart. If the frame is in ground circuit, the frame length must be considered cable of the same size as that used in the balance of the system.

Item Resistance Ohms
Connection 0.00001
Additional Contacter (series-parallel switch, relays, etc.) 0.00020
 
SMALL | MEDIUM | LARGE

Battery Cable Sizes – American Wire Gauge (maximum length in cranking motor circuit)

12 VDC

Number 00 3.7 M [12 ft]
Number 000 4.9 M [16 ft]
Number 0000 or Two Number 0(1) 6.1 M [20 ft]
Two Number 00 7.6 M [25 ft]

Battery Cable Sizes – American Wire Gauge (maximum length in cranking motor circuit)

12 VDC High-Output

Number 00 2.1 M [7 ft]
Number 000 2.7 M [9 ft]
Number 0000 or Two Number 0(1) 3.7 M [12 ft]
Two Number 00 4.3 M [14 ft]

Battery Cable Sizes – American Wire Gauge (maximum length in cranking motor circuit)

24 to 32 VDC

Number 00 6.1 M [20 ft]
Number 000 8.2 M [27 ft]
Number 0000 or Two Number 0(1) 10.7 M [35 ft]
Two Number 00 13.7 M [45 ft]
Minimum ambient temperature without starting aid -1°C [30°F]
Minimum cranking speed without starting aid 150 rpm

(1) Two strands of number 0 cable can be used in place of one number 0000 cable providing all connections are carefully made to make sure equal current flow in each parallel cable.
Last Modified:  30-May-2007
Avatar photo

Published by Jack

Hello, I'm Jack, a diesel engine fan and a blogger. I write about how to fix and improve diesel engines, from cars to trucks to generators. I also review the newest models and innovations in the diesel market. If you are interested in learning more about diesel engines, check out my blog and leave your feedback.