Jumper cable amp rating

[confused shoes]

So, how are we going to determine the right size or Ampacity (Current Carrying Capacity)
of the Jumper Cables?
++

Sum up the current requirement of your load. Your cable Ampere rating should not be lower than your total current load.

[12vdc]

Determine the starter motor plus solenoid current. That would normally range 80 to 150 Amps for small cars and SUV

Look at the AWG chart for stranded copper cable and select the best that suits your requirement.

Based from this chart, AWG4 is within 150 Amps




In reality it will depend on the material used and how good the crimps/parrot clamps.
Also to consider commercially avaialalbe booster cables are overrated, so again its better to get the largest AMP rating.


Or if youre extra OC, look for labels with ANSI/ UL 1839 mark. If not avaialble you may test it like how Underwriters Labs did the test for booster cables.

Written there:

4.9 Ampacity test
4.9.1 Attach one of the cables of the battery booster cable set to the current source and ammeter.
4.9.2 Thermocouples, consisting of No. 30 iron/constantan wire are to be connected to:
a) The outer surface of the battery booster cable clamp handle;
b) The portion of the clamp between the pivot and the jaw-end; and
c) A chart recorder with 130°C (266°F) maximum reading.
4.9.3 The current is to be increased until either the voltage drop across the cables reaches 2.5 volts or
the anticipated ampacity is reached.
4.9.4 After 10 seconds, record either the current (if the voltage drop is set to 2.5 V) or the voltage drop
(if the current is set at the anticipated ampacity).
4.9.5 After 25 seconds, the current is to be turned off.
4.9.6 The temperatures of the clamp are to be monitored for an additional two minutes and the maximum
temperatures are to be recorded. Table 4.3 specifies the maximum temperature rises.
4.9.7 Repeat the steps in 4.9.1 – 4.9.6 with the other battery booster cable in the set.
4.9.8 When more than one test is run with a cable, it is to be allowed to cool for 15 minutes before
retesting.
4.9.9 The rating of the battery booster cable is not to exceed the largest of the test currents that does not
produce a total voltage drop greater than 5 V across both conductors of the set or a temperature greater
than that specified in Table 4.3 for that conductor.

[12vdc]

16 steps to jumpstart a car by Underwriters Lab

10.1.6 “WARNING – BATTERIES PRODUCE EXPLOSIVE GASES.”
10.1.7 “Note – Consult Automobile Owner’s Manual and Follow All Instructions.”
10.1.8 “SHIELD EYES AND FACE FROM BATTERIES AT ALL TIMES. BE SURE VENT CAPS ARE
TIGHT AND LEVEL. PLACE DAMP CLOTH OVER ANY VENT CAPS ON BOTH BATTERIES. HANDLE
CLOTH CAREFULLY – DO NOT ALLOW CLOTH TO COME IN CONTACT WITH EYES, SKIN OR
CLOTHING. BE SURE VEHICLES DO NOT TOUCH AND BOTH ELECTRICAL SYSTEMS ARE OFF
AND THE SAME VOLTAGE.”
10.1.9 “Be careful to avoid moving fan blades.”
10.1.10 “Check polarity of battery posts. POSITIVE (POS, P, +) battery post usually has larger diameter
than NEGATIVE (NEG, N, −) post.”
10.1.11 “Determine which post of battery is grounded (connected) to the chassis. If negative post is
grounded, connect clamps in order shown in diagram and as described for connecting clamps with a
grounded negative post. If positive post is grounded, connect clamps in order shown in diagram and as
described for connecting clamps with a grounded positive post.” The procedure for connecting a grounded
negative post is outlined in 10.1.12 – 10.1.15. The procedure for connecting a grounded positive post is
outlined in 10.1.16 – 10.1.19.
10.1.11 effective February 14, 2008
10.1.12 “Connect positive (+) cable to positive (+) terminal of discharged battery wired to starter or
solenoid.”
10.1.13 “Connect other end of positive cable to positive terminal of booster battery.”
10.1.14 “Connect second cable (negative) to other terminal (negative) of booster battery.”
10.1.15 “MAKE FINAL CONNECTION ON ENGINE BLOCK OF STALLED VEHICLE (NOT TO
NEGATIVE POST) AWAY FROM BATTERY. STAND BACK.”
10.1.16 “Connect negative (−) cable to negative (−) terminal of discharged battery wired to starter or
solenoid.”
10.1.17 “Connect other end of negative cable to negative terminal of booster battery.”
10.1.18 “Connect second cable (positive) to other terminal (positive) of booster battery.”
10.1.19 “MAKE FINAL CONNECTION ON ENGINE BLOCK OF STALLED VEHICLE (NOT TO POSITIVE
POST) AWAY FROM BATTERY. STAND BACK.”
10.1.20 “Start vehicle and remove cables in reverse order of connection by disconnecting engine block
connection first.”

[12vdc]

And 10 safety precautions in working with batteries

11.2 “WORKING IN VICINITY OF LEAD ACID BATTERY IS DANGEROUS. THE BATTERIES
GENERATE EXPLOSIVE GASES DURING NORMAL BATTERY OPERATION. FOR THIS REASON, IT
IS OF UTMOST IMPORTANCE THAT YOU READ THESE INSTRUCTIONS AND FOLLOW THEM
EXACTLY.”
11.3 “Wear complete eye protection and clothing protection. Avoid touching eyes while working near
battery.”
11.4 “If battery acid contacts skin or clothing, wash immediately with soap and water. If acid enters eye,
immediately flood eye with running cold water for a minimum of 10 minutes and get medical attention
immediately.”
11.5 “NEVER smoke or allow a spark or flame in vicinity of battery or engine.”
11.6 “Be extra cautious to reduce risk of dropping a metal tool onto battery. It is capable of producing a
spark or short-circuiting the battery or other electrical part and causing an explosion.”
11.7 “Both the battery to be jumped and the booster source (battery or another type of external power
source) shall be of the same voltage (6, 12, etc.). External power sources other than batteries shall not
exceed 16 (8) V DC for use with 12 (6) V systems.”
11.8 “Position the vehicle with the booster battery (or other power source) adjacent to the vehicle with the
discharged battery so that the connection of booster cables between both vehicles is made easily. Make
certain vehicles do not touch each other.”
11.9 “Turn off all the electrical loads on both vehicles. Set the parking brake. Place the automatic
transmissions in “PARK,” (manual transmissions in “NEUTRAL”).”

11.10 “Determine whether the discharged battery has the negative (–) or positive (+) terminal connected
to ground. The ground lead is connected to the engine block, vehicle frame or some other good metallic
ground – do not connect to carburetor or fuel lines. The battery terminal connected to the starter is the
one which is not grounded. All vehicles manufactured in the U.S.A. after 1955 have the negative battery
terminal grounded. All European and Asian passenger vehicles have been negative ground since 1971.”

11.11 “Vent caps are to be tight and level on both batteries. Place a damp cloth over any vent caps on
each battery, making certain it is clear of fan blades, belts and other moving parts. Connect the batteries
as specified on the information tag attached to the battery booster cable set.”

[uls]

hahaha

grabe OA

[boytsiks]

Review ng EEFB-313?

[joemarski]

hahaha

grabe OA

Hahaha! Grave talwaga as in risen from the grave.
Kung meron palang makiki- jumper sa iyo kasi nadiskarga ang baterya niya,
tapos sasabihin mo sa kanya "O SIGE. PERO GANITO ANG GAWIN MO HA"
sabay bigay sa kanya nitong "veeerrrryyyy lomg list of safe procedures"...

Kamot sigurado siya ng ulo sabay sabing "eh sir, manual pala sasakyan ko, itutulak ko na lang". :hysterical:

[12vdc]

You may download UL1839 material here
http://www.google.com.ph/url?sa=t&rc...48705608,d.aGc

note: please be discreet, this is a copyrighted material

Department of Homeland Security might detect.

LOL

[_Cathy_]

It's all Greek to me

[joemarski]

You may download UL1839 material here
http://www.google.com.ph/url?sa=t&rc...48705608,d.aGc

note: please be discreet, this is a copyrighted material

Department of Homeland Security might detect.

LOL

Bwahahaha! Parang 'yan 'yung narinig ko sa IRON MAN ah. :laughbounce: