Frederic P. Hartwell

Frederic P.
Hartwell
Articles
Code Forum
Gas Pipe Bonding
Quizzes on the Code
Branch circuits — Art. 210 (part 1)
Quizzes on the Code
Grounded conductors — Art. 200
Wiring a building switchboard from an outdoor transformer.
Many rules must be correlated when a customer-owned outdoor transformer supplies a large switchboard.We received a deceptively simple question about the
Code Forum 1
Cord Drops from Wireways
Quizzes on the Code
Limited Energy — Articles 720-770; Chapter 8
Illustrated Changes In The 1999 NEC — Part 4 of 4
A new NEC is on tap, with major changes in how the document presents the material, even changing to a new full-page format.
Quizzes on the Code
Medium voltage — Article 710
Illustrated Changes In The 1999 NEC — Part 3 of 4
A new NEC is on tap, with major changes in how the document presents the material, even changing to a new full-page format.
Quizzes on the Code
Standby Systems — Articles 700-705
Illustrated Changes In The 1999 NEC — Part 2 of 4
A new NEC is on tap, with major changes in how the document presents the material, even changing to a new full-page format.
Thoughts from our Shop ...
What's Wrong with Exceptions?
Illustrated Changes in the 1999 NEC — Part 1 of 4
A new NEC is on tap, with major changes in how the document presents the material, even changing to a new full-page format.
Quizzes on the Code
Special Equipment—Articles 604-675, 685-695
Quizzes on the Code
Electric Signs — Article 600
Electrical Testing Feed
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