How are terminal blocks depicted in a wiring diagram 1 Answer. Above the Terminal Blocks are the circles, label TB1:9 through TB1:14 on the right. Which stands for Terminal Block (Strip) 1 - Terminal 9 through Terminal 14. Which depicts a three level terminal block, and the wires (cables) connected on each side, and where those cable go. These are certainly not the only ways,..wiring - How do you use a screwless terminal block120v Electric Motor Wiring - Electrical Engineering Stackcapacitor - Single Phase Induction Motor Wiring helpHow to wiring up single phase induction motorSee more results[PDF] Terminal Block - control4 Refer to the Control4® Terminal Block wiring diagrams in this guide along with the Terminal Block Installation Guide (ctrl4/blockinstall) to install the terminal blocks for these Panelized Lighting modules: 8-Port Ethernet Switch, 48V Bus Power Supply, 8-Channel Dimmer, 8-Channel Relay, and 8-Channel 0-10V Dimmer.