1ST  - First

2ND  - Second (place)

AMB  - Ambient

AMP  - Ampere

BLK  - Blank

BOT  - Bottom

CAT  - Catalogue

CL  - Class

CORR AMPS  - Corrective Amps

CUST  - Customer

DEG  - Degrees

EFF  - Efficiency

ENCL  - Enclosure

EX  - Extra

GP  - Group

HTR  - Heater

HI  - High

LBL  - Label

LN  - Line

LO  - Low

MAX  - Maximum

MED  - Medium

MDL  - Model

MIN  - Minimum 

MOD  - Modification

MTG  - Mounting

NP  - Nameplate

NO  - Number

OPER  - Operating

PT  - Part

P/N  - Part Number

PL  - Plate

PF  - Power Factor

PROT  - Protector

REF  - Reference

RMV  - Remove

SEC  - Second (time)

SF  - Service Factor

SF AMPS  - Service Factor Amps

SGL  - Single

SHPG  - Shipping

SP  - Space

SPL  - Special

STP  - Stamp

TEMP  - Temperature

V  - Volts

W  - Watts