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Everything You Need to Know About Terminal Blocks
Wednesday, January 2, 2019

How do you connect two electrical wires? By removing the insulation of the wires from ends and then twisting them tightly together? Yes, this method of connecting wires works. But, it isn’t safe. You could apply some insulation tape to increase safety or use wire connectors. However, what if you need to connect several wires and they are located at close proximity or you need to connect several outgoing wires to an incoming wire? In that case, this method won’t be convenient or safe. Therefore, you should use terminal blocks.

Terminal Block

Terminal blocks are modular blocks that have a fully insulated frame and are used to securely connect two wires or more together. There is a conducting strip and clamping component in these blocks.
In the terminal block, there is an element like a terminal bar or metal strip for carrying current. The mounting arrangement of the body allows the block to be easily mounted on a PCB or unmounted from it. The number of blocks can be increased according to circuit requirements. Terminal blocks are perfect for keeping the wires organized and connections secure.

Types of Terminal Blocks

Structure Type
  • Single Level
    These terminal blocks are used for connecting two electrical wires together. It is the simplest type and present in one contact for input and one contact for output.
  • Dual Level
    These blocks come with another connected terminal stacked on top of first one. This arrangement saves space.
  • Three Level
    These terminal blocks have three levels. Multilevel blocks are convenient because a single block can be used for multiple connections.
Device Type
  • Ground Terminal Block
    These terminal blocks look like single level blocks. However, the metal connections and blocks are grounded to din rail or panel on which block is placed.
  • Fused Connection Terminal Block
    In a fused connection block, wires pass through a single fuse which provides extra protection.
  • Power Distribution Terminal Blocks
    Power distribution terminal blocks are used for electrical power distribution. They provide a safer, economical and convenient way to distribute electrical power from one input to multiple output sources.
  • Disconnect Terminal Block
    In these terminal blocks, wires can be disconnected easily by just lifting a knife switch or level. They offer more convenient connection and disconnection as wires don’t have to be removed. Disconnect blocks are also called switch blocks.
Clamping Options

Screw Terminal

The most commonly used connection method is screw clamp. The conductor or wire is pressed against terminal block’s conductor strip by simply loosening the screw. Once the wire is inside, it is tightened.

Spring Clamp

In these terminals, spring pressure is used for retaining the clamped wire. Spring clamp is mostly used for small wires.

There are a variety of terminal blocks available at Midwest Equipment. Check out our product catalogue to buy one.



 
 
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