Earthing is paramount to the design of new infrastructure, both in order to keep people safe by preventing electric shocks and in avoiding damage from overloading caused by excess currents running through the circuit.
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The planning and installation of new generators, substations, solar & wind farms and the associated electrical grid infrastructure requires full understanding of a site’s electrical properties for the design of an appropriate earthing system that may include earthing plates, earthing rods, or earthing pits, depending upon the exact requirements and site conditions.
If not earthed correctly, solar panels and other electrical equipment can be damaged by electrical surges, lightning strikes, and other electrical disturbances. The damage can reduce the efficiency of the solar panels and wind turbines, and even cause them to fail, leading to costly repairs or replacements.
Soil Resistivity Testing
Soil resistivity measures the capacity of the ground to pass an electrical current and is a critical factor in the planning and installation of an electrical earth, with soil layer models forming the basis of all grounding designs. The models are produced from accurate soil resistivity testing carried out on site at the predevelopment stage.
Above : Soil resistivity testing in progress on a new solar farm development.
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A series of depth readings are acquired using different electrode spacings, allowing the apparent resistivity of the ground to be recorded at regular depths to 50m or more at any given point. The resultant data is presented in tabulated form (below) as well as in graphs, listing the electrode spacing, nominal testing depth; electrical resistance for each electrode spacing (R1, R2); average resistance (Rav) and apparent resistivity for each position. As a general rule, lower resistivities make the design and installation of an earthing system simpler.
Above : Tabulated soil resistivity testing results at standard electrode spacings.
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The resistivity values are also correlated with borehole data from the site to provide the design engineer with an electrical model of the soil and bedrock layering that can also be correlated with borehole data from the site. A typical model below displays a progressive increase in resistivity with depth.
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How accurate is SUMO's underground utility survey and what types of utilities can it locate?Using cutting-edge technologies like electro-magnetics, signal induced threading, and Ground-Penetrating Radar (GPR), our underground utility surveys accurately detect a wide array of buried utilities including metal and plastic pipes, drainage systems, electricity cables, telecoms, and fiber optic cables. The methodology ensures high accuracy without the need for invasive trial holes.
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What is the turnaround time for obtaining results with SUMO's Underground Utility Detection service?SUMO’s service is built for rapid response. Contractors can receive immediate results onsite. Our equipment provides real-time information, and once we leave the site, the detected utilities are visibly marked on the ground surface for quick reference.
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Does SUMO provide detailed mapping of the detected utilities for permanent records or construction purposes?Absolutely, SUMO not only marks the detected utilities on-site but also offers high-quality, color-coded survey drawings. These drawings can include topographic features and a comprehensive record of the utility detection survey, ensuring it meets the client’s needs for future reference or pre-construction design works.
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Topographical and Geophysical surveyIn addition to mapping out utilities, our experience team can accurately survey the land, creating topographical drawings for use. With our state-of-the-art aerial technology, nothing is missed.
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What additional information can be included in the underground utility mapping service provided by SUMO?In addition to topographic features, SUMO’s mapping service can include fixed surface utility features such as inspection chambers, valve boxes, and telegraph poles. It can also incorporate key topographic details like building lines, fence lines, kerb lines, street furniture, street names, building names, and house numbers, facilitating easy site location.
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Does the utility mapping service by SUMO include standard referencing and compatibility with existing survey data?Yes, SUMO ensures the utility mapping references the ordnance survey grid and level datum as standard. Additionally, the drawings can be supplied to a specified grid and level datum and can overlay an existing topographical survey, making it a versatile and adaptable service for various project needs.
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What sets SUMO Services apart from other survey providers?SUMO stands out due to our impeccable level of service with nationwide coverage, state-of-the-art equipment, and our commitment to delivering top-quality, detailed colour-coded survey drawings in both hard and electronic formats.
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How do I request a survey quotation from SUMO Services?Requesting a quotation is easy. Just click on the "Request a Survey Quotation" button on this page, and our team will get in touch with you promptly.
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Can I book a SUMO Survey online?Yes, you can! Simply click on the "Book a SUMO Survey" button on this page, and you can schedule your survey with us at your convenience.
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What type of survey is suitable for my project or site?Our experienced team will work with you to determine the most appropriate survey for your specific needs. Contact us, and we'll assist you in making the right choice.
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Can I obtain both digital and hard copies of survey drawings?Absolutely. We offer the convenience of electronic copies for digital use and hard copies for your records. Just let us know your preference.
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Do you provide custom survey solutions for unique projects?Yes, we understand that every project is unique. Our team is highly adaptable and can tailor our surveying services to meet your specific requirements.
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How do I get in touch with SUMO Services for further questions?For any additional questions or inquiries, feel free to contact us through the contact form, and our dedicated team will assist you promptly.
Geophysical Engineering Surveys
Air Raid Shelters
Cellars & Basements
Post Tension Cables
Underground Storage Tanks
Air Voids
Chimney Flues
Rebar
Water Engineering
Badger Setts
Earthing Installations
Sinkholes
Burials
Geological Application
Soil Thermal Resistivity Testing
Buried Foundations
Landfills
Structural Investigations
Buried Manholes
Mineshafts
