W-F-1814D
TABLE III. Group A and group B, zero defect sampling plan.
Lot size |
Sample size |
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Group A |
Group B |
||
Major |
Minor |
||
2 to 8 9 to 25 26 to 50 51 to 90 91 to 150 151 to 280 281 to 500 501 to 1,200 1,201 to 3,200 3,201 to 10,000 |
100 percent 13 1/ 13 13 13 20 29 34 42 50 |
3 1/ 3 5 6 7 10 11 15 18 22 |
5 1/ 5 5 7 11 13 16 19 23 29 |
1/ If sample size equals or exceeds lot size, 100 percent inspection is required.
4.6.1.2.1.1 Classification of defects. The classification of defects for group A inspection shall be as follows:
Categories |
Defects |
Major 1 2 3 4 5 6 7 |
Material not as specified (see 3.4). Terminal mounting not as specified (see 3.5.1 ). Fuses will not pass through gauge as specified (see 3.5.3). Terminal alignment not as specified (see 3.5.2 and 3.5.3). Terminal strength not as specified (see 3.6). Broken insulating material (see 3.4.4). Marking - Incorrect class designation (see 3.14). |
Minor 8 9 10 11 12 13 |
Illegible or improperly located markings (see 3.14). Minor cuts, scratches, burrs and nicks not impairing function. Dimensions out of tolerance not affecting interchangeability, assembly, or operation. Insulation damage not causing possible mechanical or electrical failure. Incomplete removal of soldering flux residue. Other evidence of poor workmanship not affecting the function of the fuse. |
4.6.1.3 Group B inspection. Group B inspection shall consist of the inspections specified in table IV, in the order shown, and shall be made on sample units which have been subjected to and have passed group A inspection.
TABLE IV. Group B inspection.
Inspection |
Requirement paragraph |
Method paragraph |
Current-carrying capacity - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Watts loss - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Overload interrupt - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
3.7 3.8 3.9 |
4.7.3 4.7.4 4.7.5 |
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