Spacer cable ampacity
Spacer cable ampacity
(OP)
In a nut shell dozens of 34.5kv sub-transmission feeders being converted over to SP for reliability and easement constraints. Typical max feeder loadings are 600, 800 and 1,200amps and each circuit rating will be sized accordingly.
What is the typical industry standard in sizing covered conductors?
http://www.southwire.com/ProductCatalog/XTEInterfa...
What is the typical industry standard in sizing covered conductors?
http://www.southwire.com/ProductCatalog/XTEInterfa...






RE: Spacer cable ampacity
- ICEA
- ASTM B230, B231, B232, B398, B399, B400
Should be noted that the National Electrical Safety Code (NESC / IEEE Std C2) treat covered conductors (CC) as bare conductors, with the only difference that tighter conductor spacing are allowed.RE: Spacer cable ampacity
RE: Spacer cable ampacity
I think also ,ANSI/ICEA S-70-547 does not indicate the ampacity and it is referring to cable construction only.
You may calculate the ampacity following usual procedure [Neher and McGrath or IEEE 835/94]. The manufacturer could [or should] calculate this in your benefit.
RE: Spacer cable ampacity
RE: Spacer cable ampacity
You cannot use it as a MV cable in no way.
The ampacity calculated as per 738/2006 and 735/94 depends less on the covering thickness and more on conductor diameter-if the concentric stranded or compacted-on conductor type- if it is ACSR or AAC for instance-on sun rays angle and wind angle. More or less NEC is close to calculation results.
While no installation official instructions are available, in my opinion NEC is the convenient indications (if the manufacturer does not recommend less).
RE: Spacer cable ampacity
RE: Spacer cable ampacity
usually-see for instance “Insulated and covered conductor systems for Low and medium voltage over head distribution lines by H.K.Agarwal (Supreme & Co), P.Barua (Supreme & Co.):
"They are twisted together to form a bundle as there is no requirement of phase to phase clearance. Individual cores are separated only at dead ends, supports, joints and tap-offs."
then is likely Table 310.60(C)(68). Calculated is close to this table also.
RE: Spacer cable ampacity
RE: Spacer cable ampacity
https://c1.staticflickr.com/3/2899/14660261542_775...
http://www.utilityproducts.com/content/dam/up/onli...
http://sicaesa.com/resources/Hendrix+1.jpg
RE: Spacer cable ampacity