From Grace Engineered Products, Inc.
A voltage portal also makes a perfect voltage panel label.
Perhaps it is even a 'better label' because it serves two
purposes: a test point and a label. Imagine if every voltage
source entering an enclosure was wired to a voltage portal?
Workers would see and be able to test every voltage source
without voltage exposure. Adding a label around the
voltage portal meets the requirement in NFPA 70E
120.2(F)(1)(a) that employers ensure that "effective means
of locating sources of energy is employed".
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