18 New Electrical Wiring Residential 17Th Edition Chapter 4 Review Answers Solutions
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New Electrical Wiring Residential 17Th Edition Chapter 4 Review Answers Solutions - 40 earth electrode resistance measurement technique (parent 8.6) this check ought to be repeated as a minimum three times, to make certain that the reading is not tormented by interacting earthing regions. I. Report the first studying (z 1 ) example : z 1 = 10 ω ii. Flow the voltage spike to a distance of 6 meters from the unique function. File the second reading (z 2 ) example : z 2 = 10 ω iii. Flow the voltage spike to a distance of 6 meters from the authentic function. Report the 0.33 analyzing (z three ) instance : z three = 10 ω z 2 6 meter e % z 1 6 meter determine 8.7: earth electrode resistance measurement z three result: from the 3 resistance values, reap the average value of the tested earth electrode resistance. Z 1 z 2 z 3 z = = = 10 ω three.
10 parent 3.1: the planning drift chart for unmarried section and 3 section supply constructing wiring installations web site visit prepare installation plans and device specs most load type of wiring unmarried phase or 3 section publish form to licensee domestic strength deliver application shape (licensee) written approval from licensee put together work time table supervision by using wireman start wiring work restore inspection and testing paperwork g and h to licensee fee of deposit and signing of agreement licensee installs meter and presents energy deliver nine.
50 appendix v p.U. (A) 38 shape g ( law 14 ) strength deliver act 1990 supervision and of entirety certificate to :... (Call & cope with of proprietor/control of instalation see notes overleaf) part 1: info of the installation client : cope with: this installation is a/an new set up/addition/alteration of existing set up* element 2: supervision and completion i, being the able person accountable (as indicated via my signature under) for the supervision and crowning glory of the electrical work inside the above installation in component 1, details of which can be described inside the agenda of drawings in element 3, certify that the said paintings for which i have been responsible is to the fine of my information and notion in accordance with the strength rules the quantity of liability of the signatory is restrained to the electrical paintings described above in component 1 because the challenge of this certificate. For the supervision and of completion of the electric paintings: name (in block letters): certificate of competency: wireman with unmarried/ three section limit* for and on behalf of certificate of competency no.: Cope with: signature: date: 49.