These four color standards represent legacy electric power industry standards. They’re available based on specific Munsell color notations including Munsell Electric Power Industry Standard: 10BG 7.5/1.5, 7.5BG 6/1.5, 7GY 3.29/1.5 and 9GY 1.5/2.6 sheet. Each sheet is 8.5″ x 11″ and is produced with paint on paper.
Additional color standards for electrical wires, cables and electrical components can be found in the NEMA or EIA color standards.