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The jobsite, required capacity and generator features are among what to keep in mind when picking a generator. The following provides guidance on what should be considered, specifically, when making the choice.

Size It to Demand 

It’s important to pay careful attention to sizing without going overboard.

A generator must have a rated output and maximum output only large enough to support the application, plus 10 percent.

To determine power requirements, jot down the combined wattage of all of the concrete equipment and power masonry tools you'll be loading onto the circuit -  both the power required to start the equipment and the power needed to run it.

The sum total of the running power is the generator’s required rated output. The sum total for starting power is the maximum output required. 

Take those numbers and add a ten-percent buffer as a precaution. 

You don’t want to have too much buffer because diesel generators operated below 50% to 60% power are in danger of wet piling. 

In case the generator will frequently be utilized to start huge motors with varying loads, consider a model with a heavy-duty, oversized alternator to ensure adequate power to start huge motors without surging. 

Fuel Capacity 

Runtime pertains to the period of time a generator can operate before refueling. Choosing a generator that meets your jobsite’s load requirements 100% in a realistically-typical workday is the best bet. Too small will result in lost time for your crew to refuel. However, if you use it five hours on the typical day, having one that lasts eight is greater than you need to spend. 

For situations where it must be utilized nonstop and more time between refueling is required, generators can be found equipped with large fuel tanks or capable of connecting to external larger tanks and supplying runtimes exceeding twenty-four hours. 

Another option worth consideration is an automatic fuel priming system, which can cut downtime significantly. 

Power Choice 
Diesel-powered generators continue to be the most common due to the common fuel source with most equipment on site. Nevertheless, models using alternatives have made inroads in certain applications. 

Other power options have a tendency to find use where fuel is more application specific. For example, in oil and gas sectors using natural gas is commonplace because the fuel comes right from the wellhead. 

Some areas, especially residential, have strict noise control regulations that have to be followed. The industry standard for sound levels is about 70 decibels heard from 23 feet away. Most meet this, but you’ll want to check the area regulations to see if you do need a generator with sound dampening. 

Site contamination can additionally be a concern in certain areas. . A unit with an internal leakage reservoir solves this.  

Consider a generator with curbside care access to make it simpler and much more efficient to maintain fluids and service points, as they're all on one side. To further improve accessibility, many models come with large side entry doors. 

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