DSH 309 Overcurrent Protection, Note
http://decisions.iecee.org/icons/ecblank.gifhttp://decisions.iecee.org/icons/ecblank.gifDSH 309
Overcurrent Protection, Note
9.6
61010-1(ed.1);am1;am2
Standard:
IEC 61010
Sub clause:
9.6
Sheet n. 309
Page 1(1)
Subject:
Overcurrent Protection, Note
Key words:
- Mains
- Fuse
Provisional decision taken by ETF3 and confirmed by CTL at its 38th meeting, in Toronto
Question:
The note recommends that both supply conductors are fused. How is this recommendation applied?
Decision:
The standard allows the use of a single fuse and therefore, under CB rules this is accepted.
Explanation:
Where a supply is not polarised then equipment employing earthing for protection should be provided with a fuse in both mains conductors.
Evaluators are requested to draw the attention of submittors to this situation and make an informative note in the report as appropriate.
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