Otis Singleton
Building a temporary electrical service is a complex process that requires careful planning and execution. It is essential to consult with a qualified electrician or electrical contractor to ensure compliance with local regulations and safety standards. The process typically involves installing a temporary power pole, running electrical wires, and setting up a meter base and load center panel. In some cases, it may be necessary to coordinate with the utility company to bring power from the street to the temporary pole. Proper installation and configuration are crucial to ensure a safe and reliable temporary electrical service during construction or other short-term power needs.
| Characteristics | Values |
|---|---|
| Purpose | To provide temporary power to a house build site |
| Voltage | 115 volts (most common), 230 volts |
| Wire Type | AL wire, 4/0 wire, 350 KCMIL XHHW-2 aluminium wire |
| Wire Length | Should be long enough to reach from the temporary pole to the new meter |
| Wire Gauge | 2" PVC |
| Amperage | 200 amps (common), 320/400 amps (for multiple buildings) |
| Temporary Pole | Provided by the utility company or installed by the customer |
| Distance from Building | Temporary pole should be at least 5 feet away from the building |
| Conduit | 2" Schedule 80 PVC conduit |
| Breaker Spaces | 40-42 spaces |
| Main Breaker | 200A |
| Subpanel | 200A interior subpanel |
| Transformer | Should be close to the pole to avoid costly cable runs |
| Tap Rules | No tapping the tapped conductor outdoors |
| Grounding | Ground rod as required by the NEC |
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What You'll Learn
Contact your utility company to apply for temporary power
Contacting your utility company is a crucial step in setting up temporary electrical service. They will guide you through the process of applying for temporary power and ensuring that your setup meets their requirements. Here are some detailed instructions on how to proceed:
Contact Your Utility Company
Firstly, reach out to your utility company to understand their specific procedures for temporary power applications. They can advise you on the options available, such as bringing power from the street to your pole or even setting up the temporary pole for an additional fee. It's important to ask about any requirements they may have during the installation process to avoid delays and unexpected costs.
Understand Voltage Requirements
Most temporary power setups provide 115 volts, but if you require 230 volts, additional steps are necessary. Consult with your utility company to understand the modifications needed to achieve this higher voltage. They can guide you on running an additional wire and connecting the second service lead accordingly.
Discuss Permanent Power Plans
If you're planning to transition from temporary to permanent power in the future, discuss this with your utility company. They may be able to advise on efficient ways to set up your temporary service to facilitate an easier transition. For example, they might suggest installing a permanent customer-owned (CO) pole that can provide both temporary and permanent power, with the transition requiring only administrative changes.
Understand Installation Requirements
Before proceeding with any installation, ensure you understand the requirements set by your utility company. For instance, they may specify the distance your temporary setup should be from their transformer or secondary pedestal. They might also provide diagrams or guidelines for approved installation locations, which can help ensure your setup complies with safety standards.
Request Assistance if Needed
If you're unsure about any aspect of the process, don't hesitate to request assistance from your utility company or a qualified electrician. They can provide valuable insights and guidance to ensure your temporary electrical service is set up safely and correctly. Remember, electricity can be dangerous, so it's always best to seek professional advice if you have any doubts.
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Install a temporary power pole
Installing a temporary power pole is a complex process that requires careful planning and execution. Here is a step-by-step guide to help you through the installation process:
Firstly, it is essential to understand your vision and goals for the temporary power supply and the specific requirements of your project. This includes considering factors such as the amount of power needed, the duration of the temporary supply, and any relevant safety regulations that must be adhered to.
Next, contact your local power company to discuss your needs and request a temporary power pole. They will be able to advise you on the options available and any associated costs. The power company will also provide information on the process of connecting the temporary pole to live connections, which may involve trenching or using temporary wiring methods.
Before the power company arrives, you may need to prepare the site by ensuring there is adequate space and access for their equipment. This could involve clearing any obstacles and marking the location of the temporary pole. It is also important to ensure that any necessary permits or approvals are in place before work begins.
Once the power company arrives, they will install the temporary power pole and make the necessary connections. This may involve running a main service, meter, and then running a sub-service to the building. The power company will also provide guidance on any safety measures that must be followed during the installation process.
After the installation is complete, you can activate the temporary power supply by following the power company's instructions. It is important to monitor the temporary power supply regularly to ensure it is functioning correctly and safely.
By following these steps and working closely with your power company, you can safely and effectively install a temporary power pole to meet your construction or temporary electrical service needs.
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Set up a temporary service meter base
Setting up a temporary service meter base requires careful planning and adherence to local regulations. Here is a step-by-step guide to help you through the process:
Firstly, contact your local utility company to understand their specific procedures and requirements for temporary power. Some companies will bring the power from the street to your pole, and they may also set up the temporary pole for an additional fee. It is important to ensure that your setup meets their requirements to avoid delays and extra costs.
Next, you will need to decide on the location of your temporary service meter base. Consult local regulations and installation diagrams to identify approved locations. Once you have staked the location, call for locates at least two business days before beginning any digging.
Now, prepare a trench to the source equipment, ensuring you dig out completely to expose the base of the secondary pedestal or transformer pad to a depth of approximately 18 inches. Per the NEC, for residential building installations, include a warning ribbon in the trench with the conductor.
Install the post, supports, temporary service meter base, and ground rod as per the requirements outlined in the NEC. Ensure this equipment is placed no closer than 5 feet and no further than 100 feet away from the transformer or secondary pedestal.
Finally, leave a tail of wire extending at least 7 feet past the source equipment to which it will be connected. This length may vary, so refer to your job design print for specific measurements.
It is important to note that electrical work can be complex and dangerous, so consider consulting a qualified electrician or electrical contractor to ensure your temporary service meter base is installed correctly and safely.
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Prepare a trench to the source equipment
Preparing a trench to the source equipment is a crucial step in establishing a temporary electrical service. Here are the detailed steps and considerations for this process:
Firstly, it is important to determine the depth of the trench. The standard depth requirement for trenches is 36 inches. However, if this depth cannot be achieved, it is necessary to consult the relevant engineering department for guidance. In some cases, a shallower depth of 18 inches may be acceptable, but this should be confirmed with the authority.
The width of the trench should be sufficient to accommodate the conduit. For instance, a 4-inch trench is typically adequate for a power-only ditch. If the trench is dug through challenging terrain, such as rocky or uneven ground, it is essential to bed the conduit with a minimum of 4 inches of sand for stability. All conduits should be constructed using gray Schedule 40 electrical PVC material.
Before commencing any digging, it is mandatory to stake the location and call for locates at least two business days in advance. This ensures that underground utilities or potential hazards are identified and marked, preventing accidental damage during excavation.
After the trench has been dug and the conduit installed, an inspection is typically required. Contact the relevant utility company or engineering department to schedule an inspection. This step ensures that the trench and conduit meet the required specifications and standards. Once the inspection is complete and approved, the trench can be backfilled.
It is important to note that electrical lines, primary or secondary, should not be placed under a concrete foundation or slab. Always refer to local regulations and guidelines, as electrical work is subject to various standards and codes. It is generally recommended to hire a qualified trenching contractor to ensure the work is done correctly and to avoid potential issues.
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$184.5
Use a 200-amp conductor for easy conversion to permanent service
When building a temporary electrical service, it is important to consider the possibility of future upgrades. Using a 200-amp conductor is a good option if you think you may need to convert to a permanent service in the future.
A 200-amp service is commonly used in modern homes over 2000 square feet, as it has a higher capacity and can accommodate additional circuits. This is particularly relevant if you have a central heating and cooling system or multiple high-wattage appliances. If your property is larger, over 4000 square feet, you may require a 400-amp service.
When installing a 200-amp service, you will need to choose between copper or aluminium/copper-clad wires and conductors. Copper wires have better current ratings and are more heat resistant, but they are also more expensive. Aluminium wires are more cost-effective, lightweight, and still good conductors of electricity, but they are less durable.
To ensure a smooth conversion to a permanent service in the future, it is recommended to consult with a qualified electrician who can assess your current and future electrical needs. They can advise on the correct wire size, voltage, and other factors to ensure your temporary service can be easily upgraded without compromising safety.
Overall, by using a 200-amp conductor, you can have a temporary electrical service that is flexible and can be easily converted to a permanent solution when needed.
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Frequently asked questions
The first step is to call your utility company and ask about the procedures for applying for temporary power.
You will need to consult with your utility company for equipment locations and clearances before beginning the installation.
The final step is to contact the applicable jurisdiction (WA LNI or COV) to request an inspection of the installation.
