Thanks Mark, a few more details
X and Y Mains rated capacitors
Two types of safety mains rated capacitor are available: Class X and Class Y. Class X capacitors are designed for connection across the 230v mains supply, Class X are self-healing, and flame resistant. However they must NOT to be used where failure could pose a shock hazard, such as across live and earth. Class Y should be used for these applications, and in general, are a better solution for the DIYer.
These are the only type of capacitor rated for connection across mains AC voltages, for instance in mains supply EMF filtration. Any other type will fail when subjected to the stresses of constant mains AC.
X and Y Mains rated capacitors
Two types of safety mains rated capacitor are available: Class X and Class Y. Class X capacitors are designed for connection across the 230v mains supply, Class X are self-healing, and flame resistant. However they must NOT to be used where failure could pose a shock hazard, such as across live and earth. Class Y should be used for these applications, and in general, are a better solution for the DIYer.
These are the only type of capacitor rated for connection across mains AC voltages, for instance in mains supply EMF filtration. Any other type will fail when subjected to the stresses of constant mains AC.