Single line diagrams update#

Confirm loads are connected to emergency/standby feeders.

Verify process is in place that ensures the as-built drawings are maintained in a current condition.

Verify existence of as-built drawings and that they are adequately available.

Single line diagrams update#

To meet these requirements, Vertiv can conduct a comprehensive site survey to develop single-line diagrams for your facility or to update existing diagrams.

NFPA-70E requirements mandate accurate, up-to-date single-line diagrams. The single-line diagram provides the roadmap to enable proper design of equipment, redundancy, and protection. The protective devices you use must be coordinated with their time/current curves and with each other. Many times circuits are added without appropriate modifications of the standard settings on the associated upstream circuit breakers. The net effect is not always seen until some part of the system becomes overloaded or exhibits other problems. In many process facilities, loads are continually added or removed in small increments. It shows a correct power distribution path from the incoming power source to each downstream load – including the ratings and sizes of each piece of electrical equipment, their circuit conductors, and their protective devices.

View Products & ServicesĪn effective single-line diagram will clearly show how the main components of the electrical system are connected, including redundant equipment and available spares. It needs to change as your facility changes to ensure that your systems are adequately protected. As such, the single-line diagram is like a balance sheet for your facility and provides a snapshot of your facility at a moment in time. Whether you have a new or existing facility, the single-line diagram is the vital roadmap for all future testing, service and maintenance activities.