Jim Jenneson Jim Jenneson has written the last five successful editions of Electrical Principles for the Electrical Trades. He is now happily retired after a long and distinguished career as a teacher of VET electrotechnology. The first edition of his ext appeared in 1980 and quickly established itself as the bible in its field, a status which it continues to hold. The text reflects his approach to teaching - patient, thorough and focused on clarity. Read More Read Less