Unverified90% confidenceDecision RuleTime unknown
户外/穿墙埋管布线选纯铜（无氧铜）线芯并认准线径AWG23或AWG24，避免CCA（铜包铝）线——CCA电阻大、易氧化、PoE供电易发热，长期埋墙返工成本极高
1
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90%
Confidence
Long-term
Relevance
-
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Unverified户外/穿墙埋管布线应选无氧铜（纯铜）导体，避免铜包铝（CCA），CCA电阻大导致PoE供电压降和长距离衰减，且弯折易断85% similarUnverified不建议买标注CCA（铜包铝）导体的网线，电阻大、PoE供电易发热、长距离衰减严重，务必认准无氧铜（OFC）纯铜线77% similarUnverified汽车线束优先选无氧铜（OFC）导体，铜包铝（CCA）虽便宜但电阻高约60%、易氧化断裂，仅适合低电流临时用途，安全供电场景禁用CCA77% similarUnverifiedOFC无氧铜导体导电率优于CCA铜包铝线，但价格明显更高且线材更重更硬，弯折布线时不如铜包铝灵活73% similarUnverified碳纤维立管减重明显但成本高且抗冲击差，通勤/入门骑行铝合金立管刚性足够、更耐磕碰，减重收益不值溢价70% similar
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