Now, one we have our two (adaptive)point spline with a rig on one of the point which hosts profiles for future sweeps we can start creating forms. Whatever, as a result by making my encasement family alined to the top right or top left duct center will enable me to draw this element from the plan view by just tabbing and snapping to the desired pipe center. Moreover, not all the ducts banks have a duct running right on the center, for example in our case it is 4 ducts, however if it there were 5 ducts we could use the center one as an insertion/alignment. This is because in Revit MEP when you place a pipe or conduit and you use parallel pipes or ducts tool, usually you draw the parallel pipes from one side to another and it's always easy to snap to one side element rather than center. Table B.2(7) Ampacities of Three Single Insulated Conductors, Rated 0 Through 2000 Volts, in Underground Electrical Ducts (Three Conductors per Electrical Duct) Based on Ambient Earth Temperature of 20☌ (68☏), Electrical Duct Arrangement in Accordance with Figure B.As you may have noticed in the illustrations I have made my rig aligned to the center of one of the side ducts. Table B.2(6) Ampacities of Three Insulated Conductors, Rated 0 Through 2000 Volts, Within an Overall Covering (Three-Conductor Cable) in Underground Electrical Ducts (One Cable per Electrical Duct) Based on Ambient Earth Temperature of 20☌ (68☏), Electrical Duct Arrangement in Accordance with Figure B.2(1), Conductor Temperature 75☌ (167☏) Size (AWG or kcmil)ġ Electrical Duct Table B.2(5) Ampacities of Single Insulated Conductors, Rated 0 Through 2000 Volts, in Nonmagnetic Underground Electrical Ducts (One Conductor per Electrical Duct), Based on Ambient Earth Temperature of 20☌ (68☏), Electrical Duct Arrangement in Accordance with Figure B.2(1), Conductor Temperature 75☌ (167☏) Size (kcmil)ģ Electrical Ducts Ħ Electrical Ducts ĩ Electrical Ducts Ħ Electrical Ducts Fig. *Refer to 310.15 for the ampacity correction factors where the ambient temperature is other than 40☌ (104☏). Table B.2(3) Ampacities of Multiconductor Cables with Not More Than Three Insulated Conductors, Rated 0 Through 2000 Volts, in Free Air Based on Ambient Air Temperature of 40☌ (104☏) (for Types TC, MC, MI, UF, and USE Cables)* Size (AWG or kcmil) **Refer to 240.4(D) for conductor overcurrent protection limitations. *Refer to 310.15 for the ampacity correction factors where the ambient temperature is other than 30☌ (86☏). Types THHN, THHW, THW-2, THWN-2, RHH, RWH-2, USE-2, XHHW, XHHW-2, ZW-2 Table B.2(1) Ampacities of Two or Three Insulated Conductors, Rated 0 Through 2000 Volts, Within an Overall Covering (Multiconductor Cable), in Raceway in Free Air Based on Ambient Air Temperature of 30☌ (86☏)* Size (AWG or kcmil) For additional information concerning the application of these ampacities, see IEEE STD 835, Standard Power Cable Ampacity Tables. These ampacities were calculated as detailed in the basic ampacity paper, AIEE Paper 57-660, The Calculation of the Temperature Rise and Load Capability of Cable Systems, by J. In Figure B.2(1) through Figure B.2(4), where adjacent duct banks are used, a separation of 1.5 m (5 ft) between the centerlines of the closest ducts in each bank or 1.2 m (4 ft) between the extremities of the concrete envelopes is sufficient to prevent derating of the conductors due to mutual heating. Underground electrical duct bank configurations, as detailed in Figure B.2(2), Figure B.2(3), and Figure B.2(4), are utilized for conductors rated 0 through 5000 volts. Table B.2(11) provides the adjustment factors for more than three current-carrying conductors in a raceway or cable with load diversity. Typical ampacities for conductors rated 0 through 2000 volts are shown in Table B.2(1) through Table B.2(10).
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