Bussman BP/SA-30 Tamper Proof Adaptor Amp range: 20 to 30 The size-rejection sa inserts convert an Edison base receptacle to accept the rejection base s and sl fuses Ideal for retrofitting Edison base fuse panels in rental property to prevent over-fusing and bring existing panels up to compliance with the nec Once installed, the sa Adapter can not easily be removed and limits the amp rating of the fuse that can be installed Quantity per card: 3 Fuse adaptor can be used in rental property to prevent over-fusing or to bring existing fuse panels up to compliance They will convert an Edison base fuse receptacle to accept Tamper-proof fuses Once installed it can not easily be removed, and limits the size fuse that can be installed Accepts S-15 to S-7 fuses BP/SA-30: 30 amp