Relays are switches that allow a low-powered circuit to control a higher-powered circuit. A 70 amp relay is a device that can handle currents up to 70 amps. It is typically used in automotive and marine applications where high currents are required. In this article, we will discuss the 70 amp relay wiring diagram, how to wire a 70 amp relay, and some frequently asked questions about this device.
What is a 70 Amp Relay?
A 70 amp relay is an electrical switch that is designed to handle currents up to 70 amps. It is a type of electromechanical device that operates on the principle of electromagnetism. When an electrical current is applied to the coils of the relay, it creates a magnetic field that generates a force that moves the switch contacts. This allows the relay to switch high currents with a low-powered control circuit.
A 70 amp relay is typically used in applications where high currents are required, such as in automotive and marine systems. It is commonly used to control devices such as lights, motors, and other high-powered electrical loads.
How to Wire a 70 Amp Relay?
Wiring a 70 amp relay is a simple process that involves a few basic steps. Here is a step-by-step guide on how to wire a 70 amp relay:
- Choose the appropriate wires for the application. The wires should be rated for the maximum current that will flow through them.
- Connect the control circuit to the relay. This typically involves connecting the control wire to the relay’s coil terminals.
- Connect the load circuit to the relay. This involves connecting the load wires to the appropriate relay contacts.
- Ensure that the wiring is secure and that all connections are tight.
- Test the relay to ensure that it is functioning properly.
70 Amp Relay Wiring Diagram
Here is a 70 amp relay wiring diagram:
| Terminal | Function |
| 85 | Control Circuit Ground |
| 86 | Control Circuit Positive |
| 30 | Power In |
| 87 | Load Circuit Normally Open |
| 87a | Load Circuit Normally Closed |
In this diagram, the control circuit is connected to terminals 85 and 86. The power in is connected to terminal 30. The load circuit is connected to terminals 87 and 87a, which are normally open and normally closed contacts, respectively.
FAQ
What is the difference between a 70 amp relay and a 30 amp relay?
A 70 amp relay is designed to handle currents up to 70 amps, while a 30 amp relay is designed to handle currents up to 30 amps. The main difference between these two relays is their current rating.
Can a 70 amp relay be used for a 12V DC circuit?
Yes, a 70 amp relay can be used for a 12V DC circuit as long as the voltage and current ratings of the relay and the circuit are compatible. It is important to choose the appropriate wires and connectors for the application to ensure that they can handle the current that will flow through them.
What is the maximum current that can be switched by a 70 amp relay?
A 70 amp relay is designed to handle currents up to 70 amps, but it is important to choose the appropriate wires and connectors for the application to ensure that they can handle the current that will flow through them. The maximum current that can be switched by a 70 amp relay will depend on the rating of the wires and connectors that are used in the circuit.
Can a 70 amp relay be used to control a motor?
Yes, a 70 amp relay can be used to control a motor as long as the relay and the motor are compatible in terms of voltage and current rating. It is important to choose the appropriate wires and connectors for the application to ensure that they can handle the current that will flow through them. It is also important to ensure that the relay is designed to handle inductive loads, such as motors, which can generate high voltages and currents during operation.
Can a 70 amp relay be used for an AC circuit?
A 70 amp relay is typically designed for DC circuits, but there are some relays that are designed for AC circuits. It is important to choose the appropriate relay for the application to ensure that it is compatible with the voltage and current rating of the circuit.
In conclusion, wiring a 70 amp relay is a simple process that involves a few basic steps. It is important to choose the appropriate wires and connectors for the application to ensure that they can handle the current that will flow through them. By following the guidelines outlined in this article, you can wire a 70 amp relay and use it to control a wide range of high-powered electrical loads.
