A diagram (two-dimensional, in a vertical plane) which shows the major items of electrical equipment in a building; displays, floor by floor, the feeders and major items of equipment.

What is a riser in electrical?

Riser, a length of vertically oriented piping used to deliver fluid, gas, or electrical signals or power upward.

What is the importance of a riser diagram?

An electrical riser diagram helps you know the system layout, which could come in handy if you are looking at a large rise building in Chicago. You would know about the electrical wiring that has gone up in the building vertically, in a way that's organized, safe, and orderly manner.