New and Noteworthy

The latest news, highlights, insights, advice, and tips from the Pacific Mobile family.

Electrical Standards and Requirements for Your Mobile Office Trailer

We receive a lot of questions about the electrical standards and requirements of our units, so we thought we’d discuss some common electrical issues we see customers experiencing to help you avoid them and give you a resource to refer back to. 

Common Questions 

First things first, you must use a qualified, licensed electrician to connect your new building. Once an electrician is on site, they’ll typically ask the following questions to which we’ve provided our answers:  

How much power do our mobile office trailers need? 
Our answer: 125 amps/per box. 
What size is the panel?  
Our answer: 125-amp single phase, 120/240 exterior mount sub panel (unless we specify otherwise). 

Additionally, for proper functioning of your heating and cooling system, determine if you have 208 or 240 volts as your power source. Advise your electrician that the HVAC has a dual power tap that will need to be moved to the 208 prong if that is your supplied power voltage. 


If you plan to use a generator to power your office, it is critical that you use one of sufficient kilowatts to meet the office unit’s load center requirements. 

You must have a brownout kit added to the inbound panel to prevent damage to your lights, cooling and heating unit, and anything else you have plugged in. Remember to turn everything off each night before powering off the generator, so you start unloaded at the beginning of each day.   

Power Outlets 

There are outlets located along the exterior of your office and designated wet areas that are ground fault protected. All of our units are built to the latest building codes of the year they are constructed. Newer units will have LED lighting and sensors to adjust interior lighting based on motion and light from your windows. Some outlets are controlled by motion sensors and will shut off when the unit is unoccupied. These outlets are marked, and you should avoid plugging in devices that need constant power. If your lights or power outlets are acting in a manner that interferes with your ability to utilize your office effectively don’t hesitate to reach out to our service department. 

Watch the video below to see this information in action and, as always, reach out to us if you have any questions or need further assistance. We’re always happy to help! 

Share on twitter
Share on linkedin
Share on facebook
Share on email

Subscribe to Our Blog

Related Posts

Waller Creek 98 at Red River

DPR Construction set out to work on what will be the tallest building in the State of Texas. To support the construction throughout the duration of this almost decade-long project, DPR Construction needed administration and office space and restroom facilities, and fast. To secure the space they needed, they turned to their equipment provider, OES. To fill DPR Construction’s need, OES turned to their trusted partner for all mobile and modular needs, Pacific Mobile Structures.

Read More »

Michels Groveland Custom Lease

The City of San Francisco Public Utilities Commission embarked on a five-year $140 million project to repair, rehabilitate and upgrade the 19-mile-long Mountain Tunnel, a key component of the Hetch Hetchy Water System that takes water from Tuolumne County and sends it to San Francisco. The contract for the project was awarded to Michels Corporation. As a result, Michels Corporation needed to provide temporary office and administrative space, including restrooms and showers for the City of San Francisco Employees.

Read More »