Terminal blocks and terminal strips are used to connect, organize, and distribute your wires to different electrical circuits, and allow for multiple wires to be connected to the same circuits. High amperage capacity will meet your electrical needs no matter what devices you are powering. Our terminal blocks/strips come in either stud mount or screw mount, and are available in 2 positions all the way up to 14 positions. The screw type terminal blocks have a high rise divider and are suitable for use up to 600 Volts. They are UL rated and CSA certified. Stud type junction blocks are UL rated up to 300 volts, and their height allows for more wire connections to be stacked together.
Well, this guide will help you understand what these two essential accessories in electrical installations are. From definition, uses, installation, uses to features – we will explore every aspect of terminal box vs junction box.
These are boxes that house insulated terminal blocks that are used in joining two or more wires. Their main application is in factories with the main purpose of having all wires secured and terminated.
This is an enclosure that that accommodates electrical connections made from wires. They can either be made of Aluminum, Steel, Stainless Steel or a Polymer.
Their aim is to accord easy access to the wiring system during repairs or when alterations or additional conduits are needed. Furthermore, they protect the wires from extreme environmental conditions like corrosion or rain.
Let''s look at the advantages and disadvantages of these two essential accessories in electrical system.
Notable advantages we can look at include:
This is their major advantage when we compare them with other boxes. This mainly because of the terminal blocks used in connection.
Having multiple terminal boxes in your premise can save a load of space. This is due to the fact that a single box can contain numerous circuits.
Your components are kept safe they are grounded and isolated thus don''t interfere with each other. Additional safety is the test points they offer in the event of component failure in the circuit.
You can use simple tools like a screwdriver to install basic terminal boxes. Troubleshooting and maintenance is also eased by quick disconnections and connections.
However, the main challenge with the terminal box is the possibility of wires loosening. Despite securing your connections properly, vibrations from the surrounding easily loosens them.
Additionally, people tend to install very big terminal boxes in anticipation of future additional connections. We recommend them in places where non-essential wiring is required to save on space.
We can have a look at the advantages:
i. They protect the electrical wiring connections from adverse environmental effects such as moisture
ii. They offer safety since they prevent unnecessary contact of live electrical wires with human beings
iii. The plastic type is very cheap and regularly used by contractors
iv. Due to the light weight of the plastic, it can be conveniently hang anywhere
v. Shortages are minimized in the connection. This is because of the non-conductivity of plastic hence no grounding needed.
On the other hand, the limitations are:
ii. Junction Boxes placed outdoors deteriorate faster than metal due to harsh weather conditions
iii. Plastic Junction Boxes are normally not compatible with conduits. Conduits are required in such a set hence making them unsuitable.
When installing junction and terminal boxes, they must be fastened by screws on the back holes. The location should be easily accessible for technicians and placed in plain sight.
There are regulations to limit the number and length of cables in both boxes. Additionally, the consequences of not adhering are very obvious, electrical wires will end up overloaded.
When striping the cables to be joined, you must ensure that the cover goes back just far enough to be exposed. This will prevent any possible contact with adjacent connections and avert disaster.
Finally, ensure the boxes are properly earthed for the obvious reasons. The earth cables should correctly color-coded yellow/green to avoid confusion.
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