A/A Fuel GTX
Senior Member
- Location
- WI & AZ
- Occupation
- Electrician
How can these taps not be rated for copper to copper connections? They are rated for Aluminum/Aluminum and Aluminum/Copper.
Blackburn WR 159 H taps
- Thread starter A/A Fuel GTX
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LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
"For copper-to-copper combinations, use CF type shown on page 11"
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
- Occupation
- Electrician
I see what you are saying, that logically doesn't make sense.
ptonsparky
Tom
- Occupation
- EC - retired
Another hint, put the Cu below the Al.
synchro
Senior Member
- Location
- Chicago, IL
- Occupation
- EE
Those connectors may not have a large enough cross section to allow the full ampacity of the copper conductors if they were used for a copper-to-copper connection.
For example, the page at the link below mentions:
"Copper to copper connections are possible with Connector Products’ line of connectors because of the
tremendous cross-sectional advantage that we enjoy over the conductor. A CPI Tap Connector averages
an 8:1 advantage in cross-sectional area over the conductor, taking into account aluminum is
approximately 60% conductive relative to copper. There still would be a 4.8:1 advantage in ampacity in
a copper to copper connection."
https://hubbellcdn.com/ohwassets/HCE/CPI/Resources/aluminum-to-copper-connections.pdf
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