JTM Electrical and Technology, a national commercial and industrial electrical company, has delivered electrical services at 300 stores for a multiyear refresh program for a national variety store chain.  At each customer site, the electricians disconnect power to cash registers and rerun power to new registers.  They have a short window to complete the job, starting only after the stores close and finishing by midnight. For several years, JTM has successfully accommodated the required overnight schedule, to ensure all stores can remain open without interruption, and employees can seamlessly transition to the new cash registers the following business day.