What Are Terminal Blocks?

What Are Terminal Blocks?


Welcome to GTV! Today we will take a closer
look at terminal blocks. Terminal Blocks are modular, insulated blocks that secure two
or more wires together and consist of an insulating body and a clamping device. Their flexibility
allows wiring to be centralized and makes it easier to maintain complex control circuits.
Today’s control wiring systems are growing increasingly complex as equipment is confined
to smaller and smaller spaces, and industry simultaneously demands more responsiveness
and higher levels of automation. Within the control panel, these handy modular components
can be snapped securely into place on a mounting rail. When changes in the circuit need to
be made, terminal blocks can be easily added or pulled off the rail without disrupting
other wire terminations. Along with reducing complexity of control wiring, the plastic
bodies of terminal blocks also prevent shorts and therefore provide greater safety to installers
and maintenance crews. The insulating body houses the current carrying parts. The body
insulates the wire termination to minimize heat generated when current passes through
the wires. It also provides a base for the clamping mechanism and other parts such as
switches and fuses. The body of the terminal block has specially designed holes for access
to the clamping screws. The body also has a mounting foot that enables terminal block
to be snapped on and off the mounting rail without being weakened. The space efficient
design of a typical modular block permits high-density circuits to fit in a standard
control panel. A 5mm wide block can provide up to 60 terminations per linear foot. Standard
6mm single level blocks yield up to 50 terminations per linear foot; double level blocks can handle
up to 100 terminations per foot. To learn more about current carrying parts and mounting
block construction, please check out our other videos on GTV. Terminal blocks and thousands
of other products and services are available at Galco.com.

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