Technical FAQs

Ask a Question

Can S&C disconnect style fuses in HVL switches be considered FRONT Access Only?

Issue:
Can S&C disconnect style fuses in HVL switches be considered FRONT Access Only?

Product Line:
HVL/cc   HVL

Environment:
Maintenance

Cause:
Product feature clarification

Resolution:

OSHA states that there must be 6 feet behind the switchgear if it requires rear access. In this case, rear access is only required to install and tighten cable connections.

Inspector will have to make the call on this one. There is nothing to service or maintain in the rear.

***FRONT ACCESS ONLY ***

HVL/cc IS THE ONLY PRODUCT IN THIS SELECTOR WHICH IS CONSIDERED FRONT ACCESS ONLY. HVL & VISI/VAC MUST BE ENTERED AS HAVING FRONT AND REAR ACCESS
All product selector layouts and logic rules for HVL and Visi/Vac were done based on having rear access. ``Front Access Only`` must be used with caution and thought.
Consideration must be given to components that require MAINTENANCE or fuse replacement, which can no longer be mounted in the rear area of the enclosure. The HVL switch is mounted near the center of the enclosure. This center mounting allows for more flexibility of cable entry and exit, along with the ability to mount larger components behind the switch. Installation is an important consideration.
The bend radius of cable should not be less than 12 times the diameter of the cable. If the radius is less than this, damage may occur to the cable insulation. This damage may not show up for a few years, but the insulation has been stressed. At this stress point, the insulation will start to erode over time and finally fail. Ease of cable termination and connection by the installing contractor is very important.
How will the contractor make these connections if there is no rear access? The only options are from the top or bottom of the enclosure. ``Front Access Only`` will generally add more sections and/or pullboxes. Side cutouts with cover plates are a special option.



CTA-ID : 2011868
Was this helpful?
What can we do to improve the information ?