6Electrical and Structural Requirements (Continued)If your fan is to replace an existing light fixture, turnelectricity off at the main fuse box at this time andremove the existing light fixture.Turning off wall switch is not sufficient. To avoidpossible electrical shock, be sure electricity isturned off at the main fuse box before wiring. Allwiring must be in accordance with National andLocal codes and the ceiling fan must be properlygrounded as a precaution against possible electricalshock.WARNINGTo reduce the risk of fire, electrical shock, orpersonal injury, mount fan to outlet box markedacceptable for fan support of 15.88 kg (35 lbs) or less.Use screws supplied with outlet box. Most outletboxes commonly used for support of light fixturesare not acceptable for fan support and may need tobe replaced. Consult a qualified electrician ifin doubt.WARNINGNo blocking (Figure 3)Paired with a deep box, this hanger is meant to spanbetween two joists and takes the place of woodenblocking.To avoid fire or shock, follow all wiring instructionscarefully. Any electrical work not described in theseinstructions should be done or approved by alicensed electrician.WARNINGFigure 3CEILING JOISTCEILINGOUTLET BOX