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SAE J1127 Cable Code Designation
Type SGR : Starter or ground, general purpose, thermoset elastomer (synthetic rubber) insulated
Type SGT : Starter or ground, general purpose, thermoplastic insulated
Type SGX : Starter or ground, general purpose, cross (X) linked polyolefın insulated
Type STR : Starter or ground, thin wall, thermoset elastomer (synthetic rubber) insulated
Type STT : Starter or ground, thin wall, thermoplastic insulated
Type STX : Starter or ground, thin wall, cross (X) linked polyolefın insulated
Table A
lnsulation Legacy SAE Battery Cable Types Temperature Class Rating*
Thin Wall General Purpose
Thermoplastic STT SGT 1
Thermoset Elastomer STR SGR 1
Crosslinked Polyolefın STX SGX 3
*Temperature class rating is defineci as 1 = 80 °c and 3 = 125 °c . Existing three character cable type will default to these temperature classes.
Table B
lnsulation SAE Battery Cable Types** Temperature Class Rating*
Thin Wall General Purpose
Thermoplastic STT1 SGT1 1
STT2 SGT2 2
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Thermoset Elastomer STR1 SGR1 1
STR2 SGR2 2
STR3 SGR3 3
STR4 SGR4 4
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Crosslinked Polyolefın STX3 SGX3 3
STX4 SGX4 4
*Temperature class rating is defineci as 1 = 80 °C, 2 = 100 °C, 3 = 125 °C, and 4 = 150 °C.
**STT1, SGT1, STR1, SGR1, STX3, and SGX3 are new four character cable types equivalent to legacy types in Table A
Source: SAE J1127