Residential electricity rates for Atlantic City Electric customers will go up again in June by more than 17%, according to the New Jersey Board of Public Utilities. The Press of Atlantic City reports that’s an extra $28.02 per month, the BPU said, citing high demand and a shortage of supply in a press call announcing the results of the annual basic generation service auction. Atlantic City Electric customers are already reeling from overall rate increases of about 20% last year, causing many to question whether the company was making billing errors.