<html><head></head><body><div data-id="code-of-practice-4" style="text-align:left"><u class="defined-term"><u class="defined-term">Code</u> of Practice</u> 4</div></body></html>

<div data-id="what-is-half-hourly-commissioning" style="text-align:left">What is Half Hourly Commissioning?</div>

<div data-id="who-is-responsible-for-commissioning" style="text-align:left">Who is responsible for Commissioning?</div>

<div data-id="commissioning" style="text-align:left">Commissioning</div>

<div data-id="who-is-responsible-for-safety" style="text-align:left">Who is responsible for safety?</div>

<div data-id="scope-of-the-commissioning-tests" style="text-align:left">Scope of the Commissioning Tests</div>

<div data-id="im-the-commissioning-organisation-what-should-i-do" style="text-align:left">I’m the Commissioning organisation. What should I do?</div>

<div data-id="inspectiontests" style="text-align:left">Inspection/Tests</div>

<div data-id="installation-data" style="text-align:left">Installation Data</div>

<div data-id="proving-measurement-transformer-ratios" style="text-align:left">Proving Measurement Transformer Ratios</div>

<div data-id="current-transformers" style="text-align:left">Current Transformers</div>

<div data-id="voltage-transformers" style="text-align:left">Voltage Transformers</div>

<div data-id="burden-tests" style="text-align:left">Burden Tests</div>

<div data-id="secondary-injection-tests" style="text-align:left">Secondary Injection Tests</div>

<div data-id="phase-failure-detection-tests" style="text-align:left">Phase Failure Detection Tests</div>

<html><head></head><body><div data-id="commissioning-tests-with-the-system-live" style="text-align:left">Commissioning Tests with the <u class="defined-term">System</u> Live</div></body></html>

<div data-id="what-does-the-commissioning-organisation-do" style="text-align:left">What does the Commissioning organisation do?</div>

<div data-id="records" style="text-align:left">Records</div>

<div data-id="what-is-measurement-uncertainty" style="text-align:left">What is Measurement Uncertainty?</div>

<div data-id="what-do-we-mean-by-repeatability" style="text-align:left">What do we mean by repeatability?</div>

<div data-id="how-to-limit-influencing-factors" style="text-align:left">How to limit influencing factors</div>

<div data-id="measurement-uncertainty" style="text-align:left">Measurement Uncertainty</div>

<div data-id="what-is-overall-accuracy" style="text-align:left">What is Overall Accuracy?</div>

<html><head></head><body><div data-id="what-happens-when-compensation-isnt-applied-to-a-meter" style="text-align:left">What happens when Compensation isn’t applied to a <u class="defined-term">Meter</u>?</div></body></html>

<html><head></head><body><div data-id="what-happens-when-compensation-is-applied-to-a-meter" style="text-align:left">What happens when Compensation is applied to a <u class="defined-term">Meter</u>?</div></body></html>

<div data-id="overall-accuracy" style="text-align:left">Overall Accuracy</div>

<div data-id="need-more-information" style="text-align:left">Need more information?</div>

CONTENTS

Code of Practice Four V8.0

Defined Terms

Cross-references