Code updates happen for one main reason:
safety improvement. NEC (National Electrical
Code) Article 408.3 helps take electrical safety
for service entrance panels to a new level.
The code, updated in 2017, includes provisions to provide shock
protection via panelboard barriers. The barriers protect from energized
conductors on the line terminals of the main overcurrent protection
device (OCPD) in a panelboard. When the main circuit breaker in
a panel is turned off, line side terminals and conductors remain
energized from upstream via the utility or another panelboard. With
these barriers in place and the main OCPD turned off, installers are
better protected when pulling wires into the panelboard. Today, all
panelboards are shipped with shock-protective barriers. However,
barriers are new to installation procedures, so contractors may not
recognize them and accidentally throw them out—easily and often.
For most electronics and high tech companies, the bill-of-materials (BOM) is the central hub of product definition activities. It conveys the information needed by various departments, such as Engineering, Procurement and Manufacturing, to get the product built. However, current BOM development processes are not well-suited to today’s realities.