All Posts By

Lyn Cosby

A Cookie Cutter Approach Can Cost You Dough

By | Conduit, uPDate | No Comments

How often is your standardized approach resulting in an over-designed ground grid? Stop wasting your dough by blindly erring on the side of caution simply because you don’t know what lies beneath. While standardizing a ground grid design seems like it would save time and money, this approach fails to consider a site’s soil composition and resistivity. Soil resistivity is affected by variables such as layer composition, moisture, molecular structure, salt content, other chemicals, etc. Making assumptions based merely on a site’s location, visible soil observations, or soil borings is not enough to determine its apparent resistivity. All variables, especially those affecting life-safety, must be incorporated to allow for site-specific considerations…

Read More

Is Infrared Testing the Best Use of Your Maintenance Dollars?

By | Conduit | No Comments

Find it Early An unplanned outage of any kind is intolerable – and expensive. Preventive maintenance of electrical equipment plays a key role in minimizing outages, yet this type of maintenance is often overlooked. Without an effective electrical preventive maintenance program, the risk of serious electrical failure increases. According to IEEE 493-2007 — Recommended Practice for the Design of Reliable Industrial and Commercial Power Systems, electrical equipment deterioration is normal, but left unchecked it can…

Read More

NETA, NICET, and NRTL… Oh My

By | Conduit | No Comments

Membership vs. Qualification Often, engineering firms and owners specify that membership in certain testing associations is a required project qualification for electrical testing service providers. Many contractors, owners, and engineers are familiar with these organization names and their perceived value, but may not have a true understanding of the limitations that specifying these memberships impose. NETA – InterNational Electrical Testing Association NETA is a self-governed association of electrical testing firms whose member firms must meet…

Read More

Ground Fault Protection Failures

By | Conduit | No Comments

Ground Fault Testing: Why It Matters A ground fault occurs when an energized portion of a solidly-grounded electrical system becomes unintentionally connected with a path to “ground” or “earth” (through personnel, equipment enclosures, grounded conductors, conduits, fish-tape, etc.). When this happens, the system phase-to-ground voltage can cause harmful and excessive levels of current to flow through the unintentional path. The magnitude of unwanted ground current can vary, depending on a variety of system conditions. Higher…

Read More