It’s almost impossible to ignore mains inline connectors when dealing with electrical projects. These small tools are crucial to any electrical setup, especially where flexibility, safety, and durability are crucial.
However, different electrical setups have varied requirements, which means there are different types of connectors. When choosing a mains inline connector, you need to ensure it matches the task to avoid poor performance, overheating, and safety hazards.
In this guide, we’ll help you know what to look for based on your setup.
What is a mains inline connector?
A mains inline connector is basically used to connect two power cables, typically when you want to extend mains electricity from one point to another. Instead of hardwiring or running long extension leads, the connector gives you a cleaner, safer, and more flexible solution.
A common use case for these connectors is creating a safety-compliant connection between a power source and equipment that’s away from fixed power outlets. It can be either indoor or outdoor environments, such as construction equipment or event setups.
What makes inline connectors common and super-useful is that they are quite practical. They usually include:
- A plug-and-socket system that allows you to reverse the connection if needed.
- Cable grips to hold the wires securely in place.
- Insulated housing that helps keep users safe from electrical contact.
Since they are used in different setups, they come in varied shapes and sizes.
The two main types
Mains inline connectors are grouped into two main categories: two-pin and three-pin connectors. Each is designed for a different class of appliances, so understanding the difference is important.
Two-pin inline connectors
Two-pin inline connectors are used with Class 2 appliances. These are usually double-insulated, and they don’t require an earth connection. They are most common in setups that require low power, such as signages and LED lighting systems.
Two-pin inline connectors are straightforward to use, but you need to ensure that the appliances you connect don’t require grounding.
Three-pin inline connectors
Three-pin inline connectors are made for Class 1 appliances. These are devices that need to be earthed, usually because they use high voltage or have metal casings. They include refrigeration units, HVAC systems, and industrial equipment.
The third pin, which forms a triangle with the two power pins, is a dedicated earth pin meant to ensure security from power shocks. The connectors usually have a more rugged design and often offer additional protection, like splash resistance.
How to choose the right main inline connector
Choosing the right inline connector depends on the job, so you’ll need to ask yourself a few practical questions. What type of appliance are you connecting? In what environment will the connector be used? How much power will need to pass through it?
Answering these will help you match the connector to the use and safety requirements of the setup.
Here are the specific considerations:
- Appliance class: If the device is double insulated, you only need a two-pin connector. If it has a metal casing or uses a lot of power, you need a three-pin option.
- Indoor or outdoor use: Check the waterproof rating if you are working on an outdoor project or in a damp environment. IP65 will protect it from splashes. IP67 will be good enough for temporary submersion, but you need IP68 for maximum protection from water.
- Durability: If the connector will be exposed to wear and tear in a high-movement area, choose one with a rugged casing and built-in strain relief.
- Cable size compatibility: Make sure the connector fits well with the diameter of your cable. If it’s too loose, there’s a safety risk. If it’s too tight, you’ll struggle to install it.
- Voltage and current rating: Always match the connector’s specs with the device’s power requirements. Overloading can lead to overheating and even failure.
Before you select an inline connector, take your time and go through the device, environment, and power requirements. This will help you choose the right connector and ensure your connection is stable, safe, and reliable.
