An upgrade of the distribution system between the Montrose Substation and the Bel Air Substation in the city of Glendale, Calif. is underway. The city’s department of Water and Power is converting overhead 4 kV lines to 12 kV and upgrading 34.5 kV underground conductors. This work is done in the public rights-of-way and private property and entails removing, replacing, and installing line conductors, insulators, cross arms, wooden power poles, underground vaults, and duct banks with new upgraded materials and devices. The cutover to 12 kV will be done on a section by section basis according to Dean Fernandez, project manager. The work is being done by line contractor Henkels & McCoy.