Here’s a fact. Electrical standards ensure product safety and reliability.
But, how do you know if a product is reliable if it’s not tested to rigorous standards? Or when it comes time for inspection, how can you ensure it was installed according to the required standard?
For example, something as seemingly benign as using a manufacturer’s lugs with a different manufacturer’s tool can cause a crimp to not be UL certified and thus not pass inspection, leading to costly re-work, cost, and time overruns.
Standards compliance also provides engineers and procurement with a baseline to read beyond a supplier’s marketing and compare products. Be sure that the manufacturer you are considering buying from provides external or self-declaring test reports in line with the standards required for the project. Also, make sure they comply with ALL of the standard’s requirements, and if they don’t, they need to explain why or what parts do not fully comply.
With the global scale of the projects that you work on, electrical standards ensure there is seamless integration when working across borders.
What is UL 467?
This is a general safety standard used in grounding and bonding. Various tests are conducted and requirements provided as a baseline of quality for grounding and bonding equipment.
In Panduit’s case, it provides this for our direct burial compression grounding connectors. All reputable manufacturers of direct burial compression grounding connectors comply with UL 467.
UL 467 provides five requirements: Tensile force strength, in other words, how much force can be applied before any movement is detected between the connector-wire connection.
- Short time current, which simulates a fault to make sure the connectors are doing what they are intended to do
- Corrosion resistance.
- Direct Burial rating or whether a grounding connection can be buried in the earth (dirt or concrete).
- Markings such as DB (direct burial rated), AL (for use with aluminum wire only), AL-CU (for use with both aluminum and copper wire
What is IEEE 837?
This is a more stringent electrical standard than UL467 and has only 2 revisions since 1989. It is self-proclaiming by the manufacturer and not subject to a third-party testing agency similar to UL. The manufacturer should provide their test data to show that they comply such as:
- IEEE 837-1989 à IEEE 837-2002
- IEEE 837-2002 à IEEE 837-2014
There are 3 key elements of IEEE 837-2014:
- Pull out test eliminated and UL 467 rating acceptable. This is about half as stringent as the 2002 edition.
- Short time current test with a stricter requirement than UL. Used to emulate a utility-scale fault. The short time current rating is about twice as stringent as the IEEE 837-2002 edition.
- Sequence testing used to emulate harsh and heavy environmental conditions.
What is IEC 61914-2015?
This specifies requirements and tests for cable cleats that are used to secure electrical cables. To fully comply, cable cleats must pass tests for resistance to flame propagation, impact, and ultraviolet light exposure, as well as for lateral retention.
Cable cleats provide resistance to electromechanical forces resulting from a short circuit event. IEC 61914-2015 provides testing standards for this product, including the following highlights:
- Temperature rating
- Adequate resistance to flame propagation
- Lateral load testing
- Axial load testing
- Impact resistance (very light, light, medium, heavy, and very heavy)
- Resistance to electromechanical forces (ability to withstand one or more short circuit events at the manufacturer’s declared values of peak short-circuit current)
- Adequate resistance to corrosion
Partner with a company committed to meeting the daily challenges you face. Panduit offers a full solution of over 30,000 readily available parts – from cable ties to power connectors, terminals to identification – Panduit products are engineered for all aspects of designing, installing and maintaining infrastructures within EPC environments.
I want to know criteria condition of wire to wire connection pull,short time current ,resisivity
thanks for all