The invention relates to a heat-resistant cable bushing for a gas meter enclosure. Provided in the cable bushing are sealing means (15), which comprise a first material which is sealing and stable in a temperature range below a first temperature. In addition, the cable bushing has limiting means (17, 18), which are formed from at least one second material, which is stable in a temperature range above the first temperature. The limiting means (17, 18) are designed such that a gas flow passing through the cable bushing can be limited to a predetermined volume per unit time. The limiting means ensure that, in the event of the development of heat, by means of which the sealing means (15) lose their sealing effect, the gas flow passing through the cable bushing does not exceed a maximum tolerable volume per unit time.