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Monthly Archives: June 2014

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  • Exothermic Welding Training

    Our in-house training school for the ERICO CADWELD exothermic welding system provides hands-on training courses designed to demonstrate and teach the correct use and applications of the CADWELD welding system.

    CADWELD Training Course Features:

    • Learn the correct, safe and effective operation of welding systems
    • Learn the tools required to make a connection
    • All weld metals and demonstration equipment provided by ETS
    • Questions answered throughout training
    • Understanding the most commonly used exothermic connections
    • Carried out by a trained ERICO instructor
    • Practical weld demonstrations using CADWELD traditional and CADWELD PLUS
  • Contact Us

    Please feel free to contact us at any time. Simply complete the form below and press the "Send your Enquiry" button.

    Product enquiries may also be sent in this manner if preferred. Please type your enquiry below and attach your document then press "Send your Enquiry". We promise to contact you within one working hour to discuss your requirements further.

  • Q&A: What are the Advantages and Disadvantages of Using Separable Connectors?

    Question:

    I'm thinking of using separable connectors for a termination, what are the pro's and con's of using these deadbreak connectors over traditional Heatshrink or Coldshrink terminations?

    Answer:

    Separable connectors, also know as screened elbows or tee connectors, offer an alternative method of terminating cable.

    As with any method of cable termination there are positives and negative, as listed below:

    Advantages:

    - The connector is fully screened making it unaffected by adverse environmental conditions.
    - The two Faraday cages featured within the connector eliminate the need for separately installed stress control and taping of components.
    - Tee connectors can 'piggybacked', allowing more than one cable to be attached to a single bushing.
    - Each unit is factory tested for partial discharge and power frequency withstand (dependant on manufacturer).
    - Can be installed both indoor and outdoor environments.
    - Connectors can be utilised to joint cables together, using the appropriate mating part.

    Drawbacks:

    - The equipment and connector must have the correct bushing interface, unlike with heat shrink and cold shrink terminations.
    - Separable connectors are best suited for single core cables (Although three-core cables can be modified to suit).
    - Tends to be more expensive than the equivalent cold and heat shrink terminations.

    For more information on our range of separable connectors, heatshrink and coldshrink terminations, please contact our Sales Team.

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  • Services

  • Earthing Electrodes and Earth Rods

    Earthing electrodes are specifically designed and installed to improve a systems earthing. These earth electrodes must ideally penetrate into the moisture level below the ground level to reduce resistance.

    They must also consist of metal conductors (or a combination of metal conductor types), which do not corrode excessively for the period of time they are expected to serve. Earth electrodes include rods or pipes driven into the ground, metallic plates or mats buried in the earth or a copper wire ring encircling the structure.

    Underground gas piping or aluminium electrodes are NOT permitted for use as an earth electrodes.

    Earth rods are often selected on the basis of their resistance to corrosion. The other major faction in selection is cost. All too often, the cost of a product is seen as the initial up front price, but the real cost is determined by the serviceable life of the ground rod.

    Copper bonded earth rods vs copper clad
    Copper Bonded Rod vs Copper Clad Rod

    Galvanised steel rods are one of the cheapest electrodes available. However, they are not the most cost effective since they have a relatively short service life.

    Solid copper and stainless steel rods have a long service life. However, they are considerably more expensive than galvanised steel rods. In addition to this, solid copper rods are not suited to deep driving into hard ground due to the likelihood of bending.

    The copper bonded earth rod offers a compromise between the two. It has an electrolytic coating of copper deposited over a layer of nickel. This process helps ensure a long lasting, molecular bond between the copper layer and steel core. We recommend copper bonded ground rods over copper clad electrodes because the copper coating will not slip or tear when driven nor will it crack if the rod is bent.

    Copper bonded earth rods feature high resistance to corrosion, provide a low resistance path to ground and have good characteristics for deep driving.

    The Stainless Steel Option

    It is important to note that certain soils and land fill areas may not be compatible with copper. In these situations, stainless steel represents a better option.

    Stainless steel earth rods may also be an alternative, where structures or components, such as steel towers, poles or lead sheathed cables are in close proximity to an array of ground electrodes.

    In these circumstances, consideration must be given to the consequence of galvanic corrosion. The high cost of stainless steel rods prohibits their widespread use. As shown in the following graphs:

    Earth Rod Life Expectancy By Material

    Earth rod life expectancy material

    Earth Rod Comparative Costs By Material

    Earth rod material costs

    For more information on our copper earthing rods and electrodes, as well as the rest of our earthing and lightning protection products, please contact our Sales Team.

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