：HDB住户科普｜RCCB漏电开关参数别选错❗
很多住新加坡HDB的屋主都会疑惑，RCCB漏电保护器分为10mA、30mA、100mA、300mA，是不是数字越大安全性越高？
记住关键常识：毫安数值越小，跳闸灵敏度越高；数值越大灵敏度越低，保护用途完全不同，千万不要混用。
1. 10‑mA（潮湿区域保命专用）
漏电达到10毫安就立刻断电，适合浴室、智能马桶、阳台这类潮湿环境；当手部沾水触电，开关瞬间断电，防止电击造成心脏骤停。因为灵敏度过高，干燥房间安装会频繁无故跳闸，卧室客厅不适用。
2. 30‑mA（新加坡组屋家用标准）
HDB全屋插座统一使用规格，电流达到人体触电危险值就马上跳闸，平衡安全与电路稳定性，客厅、卧室、厨房所有家电插座回路优先选用30‑mA。
3. 100‑mA（仅线路防火，无法保护人体）
只能监测老旧线路漏电高温，避免电线起火；人体触碰漏电电器时开关不会跳闸，不能防止触电事故，只用于总进线或是户外长线线路，家用插座回路禁止安装。
4. 300‑mA（大楼总线路防火，家庭不可使用）
只排查严重接地故障，用来预防整栋建筑线路起火，完全没有防触电功能，仅商铺、公寓大楼总配电箱使用，普通HDB居家回路严禁安装。
💡简单总结口诀：
潮湿区域选10mA，全屋插座用30mA；
100mA、300mA只管线路防火，无法保障人身安全。
From my experience living in a Singapore HDB flat, knowing the right RCCB (Residual Current Circuit Breaker) rating is crucial for home safety. Initially, I thought bigger numbers meant better protection. However, I learned that a 10mA RCCB is extremely sensitive and best suited for wet areas like bathrooms and balconies, where the risk of electric shock is higher due to moisture. Installing a 10mA RCCB in dry rooms like the living room or bedroom causes frequent nuisance trips, which can be frustrating. The 30mA RCCB is the standard for general household circuits in HDB flats, providing a balanced level of protection by tripping quickly enough to prevent serious injury from electric shocks while avoiding unnecessary interruptions to everyday electrical usage. It’s important to use this rating for all general power sockets throughout the home including the kitchen, living areas, and bedrooms. Some homeowners consider 100mA or 300mA RCCBs for their circuits, but these are designed mainly for fire prevention by detecting high-leakage currents in the overall building wiring system and are not intended for personal shock protection. Installing these higher ratings on home outlets defeats the primary safety purpose and can leave residents vulnerable to electrical shocks. When upgrading or checking your electrical systems, I recommend consulting a qualified electrician who understands these nuances specific to Singapore’s HDB flats. Proper selection and installation of RCCB ratings not only protect against electric shock but also reduce the risk of electrical fires. Remember the simple rule: wet zones get 10mA, general sockets get 30mA, and higher ratings are reserved strictly for building-wide fire protection systems.