Building Wire, THHN, 1 AWG, White, 500 ft/ CROSS-SECTIONAL SHAPE STYLE: 6 ROUND TEMP RATING: 194.0 DEG FAHRENHEIT OUTSIDE DIAMETER: 0.435 INCHES NOMINAL ALL CONDUCTORS STRAND QUANTITY PER CONDUCTOR: 19 SINGLE CONDUCTOR CONDUCTOR FORM: STRANDED SINGLE CONDUCTOR ROUND CONDUCTOR SIZE: 1 AWG SINGLE CONDUCTOR VOLTAGE RATING: 600.0 AC MAXIMUM RATED WORKING VOLTAGE SINGLE CONDUCTOR SPECIAL FEATURES: WEIGHT 152 POUNDS COLOR: WHITE 1ST POSITION SHIELD SOLID FIRST GROUP