“A Stitch in Time...”
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How Often Should You Test?<br />
That depends upon the size and complexity of your plant. Even identical<br />
units can differ <strong>in</strong> the required check periods; experience is your best guide.<br />
In general, however, work<strong>in</strong>g apparatus – motors, generators etc. – are more<br />
likely to develop <strong>in</strong>sulation weaknesses, as compared to wir<strong>in</strong>g, <strong>in</strong>sulators<br />
and the like. A test schedule for work<strong>in</strong>g equipment should be established,<br />
vary<strong>in</strong>g from every 6 to 12 months, depend<strong>in</strong>g on the size of equipment<br />
and severity of the surround<strong>in</strong>g atmospheric conditions. For wir<strong>in</strong>g and the<br />
like, tests once a year are generally sufficient, unless the plant conditions are<br />
unusually severe.<br />
A STITCH IN TIME 61
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