Construction sites demand electricity for giving power supply to different equipment, tools, heavy machinery, and safety systems. Many construction sites have localities in remote areas without any electricity access. In this situation, selecting an appropriate generator for construction site is a must. As a result, you will be able to deliver projects timely.
Are you handling a small project or a complex one? In either case, proper planning for power requirements of the construction site will benefit you a lot as a contractor. Are you worried about how to choose the right one? In this guide by HuaQuan, you will learn how to choose with proper sizing, installation guidelines, safety tips, and recommended best practices for construction-based generators.
Why Construction Sites Demand Specific Generators
Contractors work on temporary projects on sites varying from place to place. They must arrange their facilities privately. Having a particular generator to power up the whole area is a must. The reasons involved are as follows:
- Heavy Machinery Requirements: These include large concrete mixers, bulldozers, tower cranes, and welding rigs. They require high amounts of electricity that cannot be met by casual generators.
- Lack of Grid Connection: In initial underground working or projects being carried out at remote areas, there is no connection to municipal power. In this situation, the whole site works 24/7 with the help of a generator
- Variable Power Demands: The generator made for construction sites should have flexible properties. The power loads on different days are different. For instance, on the first day, the generator powers only a few pieces of equipment and a site trailer. On day six, it will power huge HVAC units.
- Industrial Resistance: A basic home-designed generator will disrupt when operated at an extreme capacity for continuous 12 hours per day. For this purpose, you require a portable industry-specific generator to operate the site for the maximum time in a dusty environment.
Specific Requirements for a Generator for Construction Site
When assessing power solutions for your project, consider these characteristics features that are must for the construction industry.
Mobility & Portability
As a contractor, your construction sites may vary. So, a generator should be able to transport and move around easily. If you are using generators that are complex and heavy, use a crane to transport these to different floors or different localities. For instance, you will have to use cranes for trailers equipped with towing hitches or skid-placed generators mounted with lifting units.
Durability & Weather-Based Resistance
Construction sites are full of pollutants, emitted gases, mud, dust, and debris. The generator should have a running, steel-protected enclosure to protect the internal engine from these harmful components.
Fuel Efficiency
For a site that is operating for 10-12 hours/day, fuel is the most consumed essential. Modern and advanced industrial-based generators incorporate fuel injection optimized systems and different-speed engines to speed up the working of generators to achieve maximum performance within limited time. It will help contractors save hundreds of thousands of dollars every year.
Noise Pollution Control
When you are working in an urban area, around a hospital, or in a residential locality, the authorities will charge you with allegations if you exceed the certain decibels of noise. You must use a generator that has built-in sound attenuators to minimize noise pollution.
How to Calculate Power Requirements for a Construction Site
You must calculate the power needs appropriately. Follow these steps to calculate in a perfect way.
List Down All Equipment & Tools
You must list down all equipment and tools that will use power directly or indirectly. The list includes the following:
- Large cranes and complex hoists
- Concrete-based mixers and pumps
- Industrial-based welding machines
- Non-permanent lighting towers
- Dewatering pumping operations
- Site office trailers (include HVAC, computers, microwaves)
- Handheld/Manual power tools (include saws, drills, grinders)
Running vs Starting Watts
This is the most common area where majority contractors make a big error. The electrical-based motors require an extensive increase of power for a mere start up. Such types of motors are found in cranes, pumps, and saws. This “starting wattage” is usually 3-4 times more than that of “running wattage.” You must have a generator that can handle the extreme starting rise. Otherwise, the whole area will shut down.
Simultaneous Usage Planning
You must remember that all tools do not operate at one time. When you apply a diversity factor for a variety of tools, it will help you decide the generator size appropriately. Calculate the maximum amount of load from those equipment that can run at one time. For instance, assume from the site trailer, the crane, and one welding ring that are working simultaneously.
Best Fuel Types for Construction Site Generators
The correct fuel type has a large effect on your construction area’s transportation, operational costs, and environmental factors.
Diesel-Associated Generators (Most Common Among Contractors)
Diesel always dominates all fuel types.
- Advantages: Long-life of generator’s engine, maximum fuel efficiency within a short time frame, and appropriate for complex loads. Also used at the construction places to handle bulldozers, cranes, and excavators.
- Limitations: Heavy duty-based machines, strict regulations for emitting gases, and powering issues during cold weather when heaters are not installed.
Gasoline-Run Generators
Gasoline generators are applicable for mobile, light, and portable activities.
- Pros: Low costing when bought initially, easy to carry and move manually around the site, and easy to power on in extreme cold weather.
- Cons: High risks of setting on fire, low fuel efficiency, and low life of engines when used extensively.
Hybrid or Battery-Powered Systems
When emissions legal regulations become strict, battery-powered energy storage systems (BESS) connected with smaller engines are becoming famous.
- Advantages: No noise pollution, zero gas emission, suitable for inside renovation operation, and comply with urban sites with strict noise limitations.
- Disadvantages: Highly-priced, limited running time before you plug in to the battery.
| Characteristic Features | Diesel-based | Gasoline-based | Hybrid / Battery-based |
| Power Output | High to Extreme | Low to Medium | Low to Medium |
| Fuel Efficiency | Excellent | Poor | Excellent (when appropriately charged) |
| Durability/Life | 20,000+ Hours | 2,000 – 3,000 Hours | High (Just a few moving parts) |
| Best Application | Complete construction site primary power | Small hand-held or manual tools / temporary | Urban Infrastructure/ Indoor / Night work |
Selecting the Correct Size & Capacity
Selecting the kilowatt ratings of generators needs balancing the financial budget with working requirements.
- Small Sites: These include the residential buildings and commercial renovations. The demands of portable generators range between 10-20 kW. It is appropriate for manual tools, small air compressors, and a non-permanent power pole.
- Medium Sites: These include the commercial-based retails and mid-rise projects. The demands range between 50-100 kW. This range is perfect for construction area trailers, hoists, and complex welding tasks.
- Large Projects (High-Rise, Infrastructure, Mining): These include the high-rise, gold and copper mining, and huge infrastructure projects. The demands range between 250kw-1MW+. It is appropriate for large cranes and huge dewatering tasks.
The Risk of Wet Stacking: If you run a diesel generator at just 30% of its capability, it will create wet stacking. It refers to the unburnt fuel that is accumulating in the exhaust chimney of the generator. As a result, it will damage the engine and wastes the warranty of the generator.
Environmental & Construction Site Considerations
The working of a generator depends on the environment of the actual site.
- Outdoor Working: You must put a generator a little above the ground level. You can use a concrete-made pad for this purpose. It will avoid your generator to restrict the air passage underneath and get dirty with mud.
- Dust and Debris: The environments with high-performing activities demand complex and multiple-leveled air ventilation systems. As a result, they can protect their engine from choking.
- Temperature Extreme Ranges: In the coldest temperatures, install the coolant heaters and particular winter-based diesel. On the other hand, in the extreme hot temperatures, you must set up a huge-sized radiator. It will protect the walls and prevent heat shocks.
- Terrain Difficulties: If your area has a slope, remember that the engines might not take up the fuel and show wrong standard readings.
Installation & Setup Best Workable Practices
When you set up the generator appropriately, it helps you avoid lethal incidents and tools destruction.
- Appropriate Placement: You should place the generator minimum 20 ft far from the primary site. It will decrease the noise pollution for workers as well as the people around. Moreover, it will help avoid toxic pollutants exposure as these will be released in a distant place.
- Wire Management: You must use high-capacity, durable, and protected wires, e.g., SOOW. Then, protect these cables with resistant covers to prevent firing and explosion.
- Grounding Needs: OSHA incorporates grounding efficiently. When you are buying a portable generator, also purchase an optimized copper rod to prevent accidents through electric shocks.
- Fuel Storage: Store excessive fuel in proper tanks. Then, place these tanks in secondary containers to prevent wasting in case of spilling. You should store them away from the generator’s chimneys.
Safety Guidelines for Construction Site-Associated Generators
As a contractor, safety of workers and residents should be the first priority.
Fire Safety
You must place generators far from the burning materials and sites. Plus, you should install fire alarms and extinguishers at the construction area. Also, keep them updated and maintained.
Electrical Hazards
You must prioritize professionals, such as electricians and electrical engineers for handling electrical work. Also, avoid loading the circuits with excessive power.
Exhaust Ventilation
Generators release dangerous gases, including carbon monoxide. That’s why you must place the generators in airy and highly ventilated places.
Personnel Training
The workers should get training related to all emergency situations and safety hazards.
Maintenance & Operational Recommended Practices
If you follow a proper plan for maintaining the generators, they will prove cost-effective.
Following are some best tips you can adopt:
- Detailed checking everyday by a professional
- Inspecting oil levels as well as the quantity of the coolant
- Evaluating fuel quality
- Deep cleaning of air vents and filters
- Regular servicing of generators
If you adopt these measures, you will be able to increase the life of the machinery.
Common Mistakes to Avoid
- Selecting a generator by just considering its price
- Overlooking the power requirements of generators
- Placing the generators near construction sites at inappropriate places
- Not following the regular plan of maintenance
- No backup strategy in case the generator disrupts the power
If you do not make these basic mistakes, you will be able to deliver high-performance results.
Costing Reflections
The total budget includes the pricing of multiple things, apart from just including purchases.
Purchases or Rentals
Those projects that complete within a short time period must prefer renting tools instead of investing a large amount of money on them.
Fuel Expenses
Extensive working hours during the whole day require a large amount of fuel that definitely costs a huge financial burden.
Regular Maintenance Costs
Timely maintenance of generators demand relative expenses of professional repairers and repairing tools.
Transportation Expenses
Transferring generators from one site to another requires loaders. These require rental and other logistical costs.
Final Note
Selecting the appropriate generator for construction site that suits the requirements of your construction area is mandatory. It forms the basis of your project as it decides the timely delivery and successful completion of your project.
The accurate choice depends on the initial assessment of powering requirements of all tools and equipment being run at a site. It will help you choose between a diesel, gas, or a hybrid system. If you follow the maintenance and safety tips mentioned above in the guide, you will be able to get maximum benefits out of it.
Need Assistance Sizing Your Site Power? Contact Huaquan Today
You must not allow the disrupted power to disturb your whole project and delay the delivery time. To avoid this, Huaquan offers you with top-notch generators that you can handle easily at the sites. It manufactures generators with specific features that align with the contractors’ requirements. These services make Huaquan a professional and famous generators’ supplier around the world.
Do you require a 50kW generator unit for a small commercial project or a huge 1MW complex system to power the large infrastructure contract? Our expert team at Huaquan can manufacture generators according to your exact sizing demands. Contact us today at the earliest to know about the pricing of these commercially suitable generators.
FAQs
What is the recommended generator size for supporting the work at a construction area?
The size requirements depend on the power ranges at which different equipment and tools work. The professional handlers should do a detailed assessment of all tools and then decide the generator’s size.
Which one of the two generators (Diesel and Gas Generator) prove to give better results?
If you compare the diesel and gas generators, diesel ones give relatively better results at construction places. Their dominance owes to the long-term as well as optimized performance.
Can I use a single generator for all tools?
If you are dealing with a complex project, you should go for multiple efficient generators to dissipate power along different stations and speed up your work.
What are some precautionary measures I should follow to use generators safe and sound in the construction area?
You must fix them in a proper airy place, attach them to proper wires, and maintain them for their durable use.
