When using split bolts, roll up splicing tape and
push it between the forks of the bolt. This fills
in the gap and is very helpful in eliminating the sharp edges.
Our utility won't allow piercing connectors on a line side tap.
At 02:14 PM 6/25/2014, you wrote:
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Friends:
I narrowly avoided catastrophe yesterday. I
created a tap connection on a 200 amp main
breaker. I wrap split bolts with Scotch 2229
mastic and then cover that with a generous layer of Scotch 33+ tape.
On this occasion, just as I was putting the dead
front in place I noticed the glint of metal
poking through the mastic and tape. The points
on the legs of the split bolt are sharp and the
mastic and tape had crept away from this point
and exposed a tiny point of metal. This point
would have contacted the dead front lightly or
at least would have been in close
proximity. Had I energized the breaker, I would
have had a significant arc. I unwrapped both
connectors so both bolts had the legs facing
away from the dead-front, creating a good ½ of
clearance and then wrapped them more carefully.
30 years ago I had access to rubberized cloth
tape that we used instead of the mastic. I
suspect the cloth tape is more durable than the
mastic, but I dont see it in the supply houses anymore.
How do the rest of you wrap split bolts so you
are confident that the mastic wont creep away
from a high point on the connector?
Thanks in advance.
William
Gradient Cap_mini
Lic 773985
<http://www.millersolar.com/>millersolar.com
805-438-5600
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