How do i contact northern nevada energy? Northern Nevada. Residential. Customer Service: Available 24/7. (775) 834-4444. Email Customer Service. Emergency Contact. Gas Leaks, Outages & Emergencies. (775) 834-4100. IMPORTANT: For Gas Leaks & Sparking Power Lines Where is the nevada power company headquarters located? Nevada Power Company headquarters in Las Vegas. Nevada Power Company (NPC) was a Las Vegas-based company that produced, distributed, and sold electricity in the southern part of the state of Nevada. In 2005, it had over 700,000 electric customers in parts of three Nevada counties — a service area of more than 4,000 square miles (10,000 km 2).What does nv energy do in nevada? NV Energy, Inc. provides a wide range of energy services to 1.3 million customers throughout Nevada and nearly 40 million tourists annually. NV Energy is a holding company whose principal subsidiaries, Nevada Power Company and Sierra Pacific Power Company, are doing business as NV Energy. The company is headquartered in Las Vegas, Nevada.How many customers does nevada power have? In 2005, it had over 700,000 electric customers in parts of three Nevada counties — a service area of more than 4,000 square miles (10,000 km 2 ). In 1998, Nevada Power merged with Nevada's other major utility, Sierra Pacific Resources.