**Exhibit
31.2**


**Certification**








I, Richard H. Marsh,
certify that:





1.  I have reviewed this
report on Form 10-K of FirstEnergy Corp.;





2.  Based on my
knowledge, this report does not contain any untrue statement of a material fact
or omit to state a material fact necessary to make the statements made, in light
of the circumstances under which such statements were made, not misleading with
respect to the period covered by this report;





3.  Based on my
knowledge, the financial statements, and other financial information included in
this report, fairly present in all material respects the financial condition,
results of operations and cash flows of the registrant as of, and for, the
periods presented in this report;





4.  The registrant’s
other certifying officer and I are responsible for establishing and maintaining
disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e)
and 15d-15(e)) and internal control over financial reporting (as defined in
Exchange Act Rules 13a-15(f) and 15d-15(f) for the registrant and we
have:





a)
    designed such
      disclosure controls and procedures, or caused such disclosure controls and
      procedures to be designed under our supervision, to ensure that material
      information relating to the registrant, including its consolidated
      subsidiaries, is made known to us by others within those entities,
      particularly during the period in which this report is being
      prepared;





b)
    designed such
      internal control over financial reporting, or caused such internal control
      over financial reporting to be designed under our supervision, to provide
      reasonable assurance regarding the reliability of financial reporting and
      the preparation of financial statements for external purposes in
      accordance with generally accepted accounting
  principles;





c)
    evaluated the
      effectiveness of the registrant’s disclosure controls and procedures and
      presented in this report our conclusions about the effectiveness of the
      disclosure controls and procedures, as of the end of the period covered by
      this report based on such evaluation; and





d)
    disclosed in
      this report any change in the registrant’s internal control over financial
      reporting that occurred during the registrant’s most recent fiscal year
      that has materially affected, or is reasonably likely to materially
      affect, the registrant’s internal control over financial reporting;
      and





5.  The registrant’s
other certifying officer and I have disclosed, based on our most recent
evaluation of internal control over financial reporting, to the registrant’s
auditors and the audit committee of the registrant’s board of directors (or
persons performing the equivalent function):





a)
    all
      significant deficiencies and material weaknesses in the design or
      operation of internal control over financial reporting which are
      reasonably likely to adversely affect the registrant’s ability to record,
      process, summarize and report financial data; and





b)
    any fraud,
      whether or not material, that involves management or other employees who
      have a significant role in the registrant’s internal control over
      financial reporting.








Date: February 27,
2007





/s/Richard H.
      MarshRichard H.
      Marsh
      Chief
      Financial Officer








**Exhibit
31.2**


**Certification**








I, Richard H. Marsh,
certify that:





1.  I have reviewed this
report on Form 10-K of Ohio Edison Company;





2.  Based on my
knowledge, this report does not contain any untrue statement of a material fact
or omit to state a material fact necessary to make the statements made, in light
of the circumstances under which such statements were made, not misleading with
respect to the period covered by this report;





3.  Based on my
knowledge, the financial statements, and other financial information included in
this report, fairly present in all material respects the financial condition,
results of operations and cash flows of the registrant as of, and for, the
periods presented in this report;





4.  The registrant’s
other certifying officer and I are responsible for establishing and maintaining
disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e)
and 15d-15(e)) and we have:





a)
    designed such
      disclosure controls and procedures, or caused such disclosure controls and
      procedures to be designed under our supervision, to ensure that material
      information relating to the registrant, including its consolidated
      subsidiaries, is made known to us by others within those entities,
      particularly during the period in which this report is being
      prepared;





b)
    evaluated the
      effectiveness of the registrant’s disclosure controls and procedures and
      presented in this report our conclusions about the effectiveness of the
      disclosure controls and procedures, as of the end of the period covered by
      this report based on such evaluation; and





c)
    disclosed in
      this report any change in the registrant’s internal control over financial
      reporting that occurred during the registrant’s most recent fiscal year
      that has materially affected, or is reasonably likely to materially
      affect, the registrant’s internal control over financial reporting;
      and





5.  The registrant’s
other certifying officer and I have disclosed, based on our most recent
evaluation of internal control over financial reporting, to the registrant’s
auditors and the audit committee of the registrant’s board of directors (or
persons performing the equivalent function):





a)
    all
      significant deficiencies and material weaknesses in the design or
      operation of internal control over financial reporting which are
      reasonably likely to adversely affect the registrant’s ability to record,
      process, summarize and report financial data; and





b)
    any fraud,
      whether or not material, that involves management or other employees who
      have a significant role in the registrant’s internal control over
      financial reporting.








Date: February 27,
2007





/s/Richard H.
      MarshRichard H.
      Marsh
      Chief
      Financial Officer








**Exhibit
31.2**


**Certification**








I, Richard H. Marsh,
certify that:





1.  I have reviewed this
report on Form 10-K of The Cleveland Electric Illuminating Company;





2.  Based on my
knowledge, this report does not contain any untrue statement of a material fact
or omit to state a material fact necessary to make the statements made, in light
of the circumstances under which such statements were made, not misleading with
respect to the period covered by this report;





3.  Based on my
knowledge, the financial statements, and other financial information included in
this report, fairly present in all material respects the financial condition,
results of operations and cash flows of the registrant as of, and for, the
periods presented in this report;





4.  The registrant’s
other certifying officer and I are responsible for establishing and maintaining
disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e)
and 15d-15(e)) and we have:





a)
    designed such
      disclosure controls and procedures, or caused such disclosure controls and
      procedures to be designed under our supervision, to ensure that material
      information relating to the registrant, including its consolidated
      subsidiaries, is made known to us by others within those entities,
      particularly during the period in which this report is being
      prepared;





b)
    evaluated the
      effectiveness of the registrant’s disclosure controls and procedures and
      presented in this report our conclusions about the effectiveness of the
      disclosure controls and procedures, as of the end of the period covered by
      this report based on such evaluation; and





c)
    disclosed in
      this report any change in the registrant’s internal control over financial
      reporting that occurred during the registrant’s most recent fiscal year
      that has materially affected, or is reasonably likely to materially
      affect, the registrant’s internal control over financial reporting;
      and





5.  The registrant’s
other certifying officer and I have disclosed, based on our most recent
evaluation of internal control over financial reporting, to the registrant’s
auditors and the audit committee of the registrant’s board of directors (or
persons performing the equivalent function):





a)
    all
      significant deficiencies and material weaknesses in the design or
      operation of internal control over financial reporting which are
      reasonably likely to adversely affect the registrant’s ability to record,
      process, summarize and report financial data; and





b)
    any fraud,
      whether or not material, that involves management or other employees who
      have a significant role in the registrant’s internal control over
      financial reporting.








Date: February 27,
2007





/s/Richard H.
      MarshRichard H.
      Marsh
      Chief
      Financial Officer





**Exhibit
31.2**


**Certification**








I, Richard H. Marsh,
certify that:





1.  I have reviewed this
report on Form 10-K of The Toledo Edison Company;





2.  Based on my
knowledge, this report does not contain any untrue statement of a material fact
or omit to state a material fact necessary to make the statements made, in light
of the circumstances under which such statements were made, not misleading with
respect to the period covered by this report;





3.  Based on my
knowledge, the financial statements, and other financial information included in
this report, fairly present in all material respects the financial condition,
results of operations and cash flows of the registrant as of, and for, the
periods presented in this report;





4.  The registrant’s
other certifying officer and I are responsible for establishing and maintaining
disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e)
and 15d-15(e)) and we have:





a)
    designed such
      disclosure controls and procedures, or caused such disclosure controls and
      procedures to be designed under our supervision, to ensure that material
      information relating to the registrant, including its consolidated
      subsidiaries, is made known to us by others within those entities,
      particularly during the period in which this report is being
      prepared;





b)
    evaluated the
      effectiveness of the registrant’s disclosure controls and procedures and
      presented in this report our conclusions about the effectiveness of the
      disclosure controls and procedures, as of the end of the period covered by
      this report based on such evaluation; and





c)
    disclosed in
      this report any change in the registrant’s internal control over financial
      reporting that occurred during the registrant’s most recent fiscal year
      that has materially affected, or is reasonably likely to materially
      affect, the registrant’s internal control over financial reporting;
      and





5.  The registrant’s
other certifying officer and I have disclosed, based on our most recent
evaluation of internal control over financial reporting, to the registrant’s
auditors and the audit committee of the registrant’s board of directors (or
persons performing the equivalent function):





a)
    all
      significant deficiencies and material weaknesses in the design or
      operation of internal control over financial reporting which are
      reasonably likely to adversely affect the registrant’s ability to record,
      process, summarize and report financial data; and





b)
    any fraud,
      whether or not material, that involves management or other employees who
      have a significant role in the registrant’s internal control over
      financial reporting.








Date: February 27,
2007





/s/Richard H.
      MarshRichard H.
      Marsh
      Chief
      Financial Officer





**Exhibit
31.2**


**Certification**








I, Richard H. Marsh,
certify that:





1.  I have reviewed this
report on Form 10-K of Jersey Central Power & Light Company;





2.  Based on my
knowledge, this report does not contain any untrue statement of a material fact
or omit to state a material fact necessary to make the statements made, in light
of the circumstances under which such statements were made, not misleading with
respect to the period covered by this report;





3.  Based on my
knowledge, the financial statements, and other financial information included in
this report, fairly present in all material respects the financial condition,
results of operations and cash flows of the registrant as of, and for, the
periods presented in this report;





4.  The registrant’s
other certifying officer and I are responsible for establishing and maintaining
disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e)
and 15d-15(e)) and we have:





a)
    designed such
      disclosure controls and procedures, or caused such disclosure controls and
      procedures to be designed under our supervision, to ensure that material
      information relating to the registrant, including its consolidated
      subsidiaries, is made known to us by others within those entities,
      particularly during the period in which this report is being
      prepared;





b)
    evaluated the
      effectiveness of the registrant’s disclosure controls and procedures and
      presented in this report our conclusions about the effectiveness of the
      disclosure controls and procedures, as of the end of the period covered by
      this report based on such evaluation; and





c)
    disclosed in
      this report any change in the registrant’s internal control over financial
      reporting that occurred during the registrant’s most recent fiscal year
      that has materially affected, or is reasonably likely to materially
      affect, the registrant’s internal control over financial reporting;
      and





5.  The registrant’s
other certifying officer and I have disclosed, based on our most recent
evaluation of internal control over financial reporting, to the registrant’s
auditors and the audit committee of the registrant’s board of directors (or
persons performing the equivalent function):





a)
    all
      significant deficiencies and material weaknesses in the design or
      operation of internal control over financial reporting which are
      reasonably likely to adversely affect the registrant’s ability to record,
      process, summarize and report financial data; and





b)
    any fraud,
      whether or not material, that involves management or other employees who
      have a significant role in the registrant’s internal control over
      financial reporting.








Date: February 27,
2007





/s/Richard H.
      MarshRichard H.
      Marsh
      Chief
      Financial Officer





**Exhibit
31.2**


**Certification**








I, Richard H. Marsh,
certify that:





1.  I have reviewed this
report on Form 10-K of Metropolitan Edison Company;





2.  Based on my
knowledge, this report does not contain any untrue statement of a material fact
or omit to state a material fact necessary to make the statements made, in light
of the circumstances under which such statements were made, not misleading with
respect to the period covered by this report;





3.  Based on my
knowledge, the financial statements, and other financial information included in
this report, fairly present in all material respects the financial condition,
results of operations and cash flows of the registrant as of, and for, the
periods presented in this report;





4.  The registrant’s
other certifying officer and I are responsible for establishing and maintaining
disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e)
and 15d-15(e)) and we have:





a)
    designed such
      disclosure controls and procedures, or caused such disclosure controls and
      procedures to be designed under our supervision, to ensure that material
      information relating to the registrant, including its consolidated
      subsidiaries, is made known to us by others within those entities,
      particularly during the period in which this report is being
      prepared;





b)
    evaluated the
      effectiveness of the registrant’s disclosure controls and procedures and
      presented in this report our conclusions about the effectiveness of the
      disclosure controls and procedures, as of the end of the period covered by
      this report based on such evaluation; and





c)
    disclosed in
      this report any change in the registrant’s internal control over financial
      reporting that occurred during the registrant’s most recent fiscal year
      that has materially affected, or is reasonably likely to materially
      affect, the registrant’s internal control over financial reporting;
      and





5.  The registrant’s
other certifying officer and I have disclosed, based on our most recent
evaluation of internal control over financial reporting, to the registrant’s
auditors and the audit committee of the registrant’s board of directors (or
persons performing the equivalent function):





a)
    all
      significant deficiencies and material weaknesses in the design or
      operation of internal control over financial reporting which are
      reasonably likely to adversely affect the registrant’s ability to record,
      process, summarize and report financial data; and





b)
    any fraud,
      whether or not material, that involves management or other employees who
      have a significant role in the registrant’s internal control over
      financial reporting.








Date: February 27,
2007





/s/Richard H.
      MarshRichard H.
      Marsh
      Chief
      Financial Officer





**Exhibit
31.2**


**Certification**








I, Richard H. Marsh,
certify that:





1.  I have reviewed this
report on Form 10-K of Pennsylvania Electric Company;





2.  Based on my
knowledge, this report does not contain any untrue statement of a material fact
or omit to state a material fact necessary to make the statements made, in light
of the circumstances under which such statements were made, not misleading with
respect to the period covered by this report;





3.  Based on my
knowledge, the financial statements, and other financial information included in
this report, fairly present in all material respects the financial condition,
results of operations and cash flows of the registrant as of, and for, the
periods presented in this report;





4.  The registrant’s
other certifying officer and I are responsible for establishing and maintaining
disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e)
and 15d-15(e)) and we have:





a)
    designed such
      disclosure controls and procedures, or caused such disclosure controls and
      procedures to be designed under our supervision, to ensure that material
      information relating to the registrant, including its consolidated
      subsidiaries, is made known to us by others within those entities,
      particularly during the period in which this report is being
      prepared;





b)
    evaluated the
      effectiveness of the registrant’s disclosure controls and procedures and
      presented in this report our conclusions about the effectiveness of the
      disclosure controls and procedures, as of the end of the period covered by
      this report based on such evaluation; and





c)
    disclosed in
      this report any change in the registrant’s internal control over financial
      reporting that occurred during the registrant’s most recent fiscal year
      that has materially affected, or is reasonably likely to materially
      affect, the registrant’s internal control over financial reporting;
      and





5.  The registrant’s
other certifying officer and I have disclosed, based on our most recent
evaluation of internal control over financial reporting, to the registrant’s
auditors and the audit committee of the registrant’s board of directors (or
persons performing the equivalent function):





a)
    all
      significant deficiencies and material weaknesses in the design or
      operation of internal control over financial reporting which are
      reasonably likely to adversely affect the registrant’s ability to record,
      process, summarize and report financial data; and





b)
    any fraud,
      whether or not material, that involves management or other employees who
      have a significant role in the registrant’s internal control over
      financial reporting.








Date: February 27,
2007





/s/Richard H.
      MarshRichard H.
      Marsh
      Chief
      Financial Officer