With the most typical electrical package, a minimum Two-Pole, 30 Amp power supply will be required. The actual requirement will depend on the factory installed equipment and any additional equipment you will be connecting to the Electrical Load Center. Please consult with your Sales Representative for your specific requirements.
The Two-Pole electrical power supply feeder provides 208/240 volts of power to what is called a Load Center (Circuit Breaker Panel). The Load Center will provide electrical feeds for the equipment at 208/240 or 120-volts using Branch Circuit Breakers.
The Typical electrical package in a basic security booth will include a Duplex Receptacle, a Light Fixture, and a HVAC unit.
The Duplex Receptacle is like the Receptacle Outlets you likely have in your home. The Outlets in a home are typically 15-amp rated and provide 120-volts of power. Commercial outlets are 20 amp rated and provide 125-volts of power. The 15-amp rated outlet will only allow for a 15-amp device to plug into it. However, a 20-amp rated outlet will allow for a 15- or 20-amp device to plug into it.
15-Amp Receptacle
20-Amp Receptacle
By design a device that includes a 20-amp plug cannot plug into a 15-amp receptacle. This prevents the circuit from drawing more than the rated amperage.
The Branch Circuit Breaker installed in the guard booth load center prevents the circuit from drawing more amperage power than it is rated for. The Breaker prevents the circuit from overheating and causing a fire. Multiple Outlets can be installed on a circuit as well as the Lighting. If the amount of amperage power is too high, the Circuit Breaker will trip. Thus, protecting the circuit and the wiring. The Branch Circuit Breaker protects the installed wiring downstream in the electrical circuit and electrical devices. The Branch Circuit Breakers are connected to the interior of the Load Center to what is called the Buss. The Buss transfers the power from the service feed to the Branch Breakers. There are two Buss Bars that run in the interior of the Load Center in an alternating pattern. Each of these Buss Bars provides alternating 120 volts of power called Phases. For a 208/240-volt system these phases are identified as “Phase A” and “Phase B”. The Branch Breakers will connect to either one or both of Buss Bar Phases. When a Single-Pole Branch Breaker is connected to either Phase A or B, it will provide 120 volts of power for up to the rated Amperage of the Circuit Breaker. When a Two-Pole Branch Breaker is connected, it will connect to both “Phases A and B”, and it will provide 208/240-volts of power up to the rated amperage of the Circuit Breaker. Typically, the HVAC unit and Heater are powered by a 208/240-volt circuit.
The Load Center in a guard booth can be provided with a Main Disconnecting Circuit Breaker or a Main lug only. If a Main Breaker is provided, the Main Breaker protects the Buss from overheating.
The site provided Service Power Feed and associated wiring will be protected by the Branch Circuit Breaker that is installed in the Panel supplying power to the Booth. The Site Electrician will determine the Service Feed Breaker Amperage Rating and the AWG wire size. This is based on the site conditions such as the distance of the run from the feeding Panel to the Booth.