Tag Archives: Polyconcrete

QUICK GUIDE: Earth Pit Selection

Earth Pit enclosures are positioned where ground rods are located and where access is needed to perform maintenance on equipment. Earth rods and equipment often traverse through various urban environment and careless Earth Pit selection can potentially ensue injury through accidental contact, not to mention theft. Therefore, selection of appropriate Earth Pits can mitigate the possible costs and minimise potential harm to by passers that can occur from incorrect selection of Earth Pits.

WAPP (West Australian Power Protection) offers a range of Earth Pit solutions to prevent the exposure to ground rods and equipment to unwanted external access. Coming in all types of sizes and materials, these products are designed to be used in several urban environments, attending to design considerations specific to that location.

Things to consider when choosing an Earth Pit:

Size

Earth Pits can be used in many applications ranging data/ communication fibre-optic cables to earth/ground rod enclosures. With each application, cable management would vary and would ultimately vary the size required. Therefore, consideration of the layout of varying application needs to be reviewed to select the correct width, length and depth of enclosure.

Traffic & Loading

Each Earth Pit type is designed to handle a specific load and the choice of enclosure is usually determined by the types of loads it would have to endure. Whether these are situated in vehicular or non vehicular areas and whether the possibility of non-deliberate traffic in non-vehicular areas exists, different types of Earth Pits would be more suited than others.

Load standards are a tool to enable an objective comparison of products by providing an independent measurement scale.

Safe_Working_Loads_Earth_Pit

Safety and Security

Earth rod enclosures must not only endure by passers and vehicles, but also protect the surroundings such as livestock against the exposure to live electrical components through accidental contact and unauthorised access. Earth Pits comes in many forms that adhere to different levels of security, depending on whether its placed in a populated area or just surrounded by livestock. Some come with locks and the appropriate labelling.

Materials

  • High Impact Polypropylene

Suitable for lighter load rating applications, these inspection housings are best suited for pedestrian and non-vehicular traffic areas. ERICO’s PIT03 design offers a high level of protection for critical grounding terminations through the use of its lockable lid. Its lightweight design allows easy handling, storage and transportation, and is suitable for both paving and hot tar applications.

PIT03 Inspection Housing from ERICO:

PVC_Earth_Pit

  • Polycrete

Short for Poly Concrete, Polycrete Earth Pits have excellent insulating properties, high load capacity, chemical resistance and zero water absorption, allowing them to act as ideal electrical and communications enclosures. Most commonly used in areas exposed to heavy wear and high loadings, Polycrete are best suited for carparks, roadways and industrial areas.

T416D Inspection Housing from ERICO:

Polyconcrete_Earth_Pit

  • Concrete

Concrete Earth Pits are suited for most types of enclosures needs. With a load rating to about 4500kg, concrete is like Polycrete and would be best suited for carparks, roadways and industrial areas.

IPO900C Inspection Housing from ERICO:

Concrete_Earth_Pit

Ease of workability

When selecting an Earth Pit in terms of ease of workability, Polycrete would come on top. In comparison, Polycrete comes in around 14kg, whilst concrete weighs around 26 kg. Therefore, Polycrete is lighter and therefore less cumbersome than traditional concrete pits.

The National Code of Practice for Manual Handling recommends a maximum unassisted lifting weight of 55kg. However, from 16-55kg, the percentage of people that can carry the weight decreases. Weight identification is therefore important when considering the ease of workability when dealing with Earth Pits.

When considering Earth Pits, it is advisable to consider the many types of enclosures available in the market. As mentioned above, it is important to select the correct one to ultimately minimise both harm and inconvenience.

For technical support on specifying the right Earth Pit and installation advice, please feel free to contact us today.