A secondary pipe or other channel connected to the main connection, to provide alternative path. To bypass. Every UPS power supply, regardless of manufacturer has an internal bypass. PowerContinuity systems always install an external bypass as well which is wall mounted to allow safe removal of a UPS and safe internal working on a UPS. Health and Safety is at the forefront of our best working practice. Continuous power bypasses the national grid to provide true power protection. Every T2000 UPS has an internal bypass and an external bypass for your safety.